age physiology. Presentation, report age physiology Periods of extrauterine development of the human body

age periodization. age periodization. Over 90 centenarians. 75-90 old age. 60-75 old age. 35-60 2nd period of mature age. 21-35 1st period of adulthood. 17-21 late youth. 15-17 early youth. 11-15 adolescence. 7-11 junior school age. 3-7 preschool age. 1-3 early age. 0-1 infancy. Age periods differ in relativity, conventionality, averageness, but each individual person takes his place. During the transition from one stage to another, psychological crises of development may arise - special periods of ontogeny, characterized by psychological changes. The form, duration, and severity of the course of crises are individual. The essence of development is the fundamental difference between development and other changes - the presence of not only quantitative, but also qualitative changes, the emergence of neoplasms - new mechanisms.

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Branches of psychology

"Existential psychology" - Existential psychology. Origins. Guilt. Martin Heidegger. Existentialist declamation. Soren Kierkegaard. Definition. Existential psychotherapy in Russia. Jean-Paul Sartre. Rollo May. Understanding time. Human understanding. Existential analysis. Edmund Husserl. Regular educational projects.

"The subject of developmental psychology" - XIX century. The main directions of efforts to activate the speech of the child. The emergence of new activities. The social situation of development in the period of maturity. The main lines of influence of the game on the development of the psyche. Addiction. The social situation of personality development in youth. Only in the 16th-17th centuries did special children's clothing appear.

"Legal psychology" - Signs of criminal behavior. Stress: types, phases and recommendations for self-regulation. professional deformation. Psychological features of the inspection of the scene. Communication in the professional activities of a lawyer. Model of the communicative process. Interdisciplinary connections of legal psychology. The structure of the conclusion of a forensic psychological examination.

"Engineering psychology" - Diagnostic tasks. Engineering psychology is associated with related fields of knowledge. Ergonomics. Development prospects. Object, subject and tasks of engineering psychology. Methodological principles. Stages of development. operational tasks. Tasks of engineering psychology. Ergonomics object system. Psychodiagnostic methods.

"Special psychology" - Tiflopsychology. Deviations in development are very different. Introduction to special psychology and pedagogy. Based on the data of special psychology, a training system is being built. The number of children and adolescents is increasing all over the world. Researchers. Tasks of special psychology. Various approaches to the classification and characteristics of the contingent.

Purpose: to introduce students to the periodization of human life, to summarize the material on the influence of various factors on growth, development, aging; from the actual material to derive patterns of age-related changes.

Equipment: reproductions of paintings by Da Vinci “Madonna Litta”, J-B. Grez “Girl in Grey”, V.E. Makovsky “Girl in Ukrainian costume”, V.E. Yaroshenko “Cursist”, V.G. Perov “Boy preparing for a fight”, V.I. Surikov “Siberian beauty”, V.A. Serov “Girl illuminated by the sun”, I.N. Kramskoy “Portrait of I.I. Shishkina”, I.N. Kramskoy “Portrait of I.A. Goncharova”, I.N. Kramskoy “Peasant with a bridle”, V.G. Perov “Old parents at the grave of their son”; graphs, tables of age-related changes.

The board lists the different categories of ages.

Teacher: Today we will get acquainted with the features of postembryonic human development. In everyday life and in literature, we often encounter concepts: the age of milk teeth, one-year-old, age of marriage, the age of a preschooler, the age of majority, the age of the “why-why”, the age of the voter, the age of complete ossification, the age of Christ.

What groups can be distinguished in this list, on what basis to classify? (concepts that determine the biological age, psychological, social). The concept of "age" means:

  1. calendar age - life expectancy;
  2. biological - the age of development, maturation, aging, is determined by the totality of metabolic, structural, regulatory processes;
  3. psychological - the level of development of mental functions (thinking, speech, etc.) in comparison with the average statistical norms;
  4. social is determined by a set of social roles.

Setting goals and objectives of the lesson:

Today we will generalize knowledge about the regulatory mechanisms of growth, development, aging, establish the patterns of age-related changes, and establish the relationship of different age-related concepts.

Organization of work in groups. Each group receives a set of reproductions, texts on age periodization, excerpts from literary works and scientific articles, and a package of tasks.

Based on the materials offered to you, formulate which factor affects growth, development, aging, argue your theses with facts.

For normal growth of the skeleton, a sufficient amount of thyroid hormones is necessary, they affect the growth and development of the sex glands. Thyroxine is necessary for the differentiation of nerve cells, increasing the tone of the reticular formation, thyroid hormones have an activating effect on the cerebral cortex. With a deficiency, dwarfism, cretinism develops. Lack of hormonal thyroid glands causes a violation of bones, hair, nails, conditioned reflex activity changes. Sex hormones of the adrenal glands are involved in the development of sexual characteristics, especially their role is great in senile and childhood. Androgens of the gonads affect the secondary sexual characteristics, the rate of closure of the epiphyseal growth zones. With insufficient secretion, bone growth slows down, body proportions are disturbed. The male sex hormone has a pronounced effect on higher nervous activity.

The growth of the body depends on heredity. Children grow most actively in spring and summer: 3-4 times faster than in winter. Specialists call the time of especially rapid growth the period of physiological traction, the first falls on 5-6 years, the second on 12-14. Nature provides a unique opportunity to grow in height only up to a certain age: girls up to 16-18 years old, boys up to 18-20. After that, the organism does not grow, as the growth zones ossify and close. With age, the reverse process is gaining momentum. Over the years, a person begins to stoop, and the bones become more porous and seem to be compressed under the weight of the body. After 50 years, growth begins to decrease by about 1 cm. in year. Good nutrition affects growth. The body stops growing , if he lacks calcium, phosphorus, trace elements: zinc, magnesium, fluorine. Lack of vitamins alters growth and development. Lack of vitamin A slows down growth, causes “night blindness”, B 1 - damage to the peripheral nerves of the extremities, B 2 - weight loss, B 6 - nervous disorders, B 12 - causes disease nervous system. E - changes in the gonads.

Text 3

At the beginning of the 20th century, a person walked 75,000 km in his life, a modern city dweller only 25,000 km. Doctors talk about a painful state of immobility. Both muscle strength and bone strength, the reliability of the immune response, metabolic activity, the state of the heart, blood vessels, and lungs depend on everyday loads. Due to the decrease in muscle mass, the capacity of the entire vascular system decreases, the number of working capillaries in the heart and skeletal muscles decreases. In those who move little, calcium is washed out of the bones and teeth. Bones become brittle and brittle, teeth often have to be treated. Physical exercise is necessary for all ages, but especially in adolescence, as it allows you to overcome body imbalances.

Text 4

There are differences in life expectancy between men and women. Life expectancy is longer for women, but the health of long-term women is worse than that of men of the same age. There is, as it were, a selection of the healthiest men due to their higher mortality; women, although they achieve longevity in a relatively larger number, still have a load of past diseases. In men, atherosclerosis begins to progress early, mortality in men at the age of 40 is 7.4 times higher than in women. Sexual dimorphism also exists in many characteristics of vital activity (BP, heart function, pulmonary ventilation, hormones, proteins, lipids).

Longevity is affected by the interaction of 2 components: genetic factors and the environment. Of the possible influences of social factors, personal activity, mood, and adaptation are in the first place; from medical factors - the absence of risk factors (diabetes, hypertension); from environmental factors - place of residence, environmental influences.

Text 5

In 1920, 2 girls were found in India, who lived for several years in a wolf family. They ran only on all fours, they were very afraid of people, at night they roamed and howled like wolves. The eldest uttered the first word only after 2 years, after 3 years she tried to get on her feet, after 2 years she spoke 6 words. After 8 years, she began to hardly pronounce short, simple phrases. She spent 9 years in a missionary shelter (from 8 to 17 years old). It is believed that she would have reached the level of a 10-12 year old child by the age of 35-40. To date, more than 40 cases of capturing "wolf children" have been described. The human ability to walk on its feet, the ability to speak and accumulate knowledge, is undoubtedly an innate basis. But the corresponding nervous mechanisms are switched on only if the child communicates with adults, gradually adopts their behavior. If a critical period is missed (from several months to 2 years), then speech will not develop. The possibility of further development into a normal human personality is excluded.

Text 6

The left and right hemispheres of our brain have different functions. The left is responsible for speech, writing, counting, logical thinking, the right provides the perception of holistic images, is responsible for artistic abilities. A person is not born with functional asymmetry, it is formed from writing: exercises activate the left hemisphere. If a person remains illiterate all his life or is engaged in routine interhemispheric work, asymmetry does not develop in him. It fades and smooths out in the elderly, who cease to engage in intense mental activity. On the contrary, when a person solves a task that requires mental effort, the asymmetry increases.

Teacher: Scientists, trying to explain how human life unfolds, how genetic factors and the environment interact, proposed a model. It's called the landscape of life. Imagine a sloping terrain with hills and depressions, on which a ball is rolling - a developing organism. The terrain imposes certain restrictions on the movement of the ball as it descends. An occasional depression or hillock changes course. The model illustrates that there are natural development paths, but the environment affects the route unpredictably. Our life is a chain of continuous transformations, the onset of biological age is determined by changes in bones, teeth, and metabolic processes. To distinguish the stages, psychologists took as a basis qualitative changes associated with the ability to act not only better and faster, but most importantly in a different way. Scientists identify periods of crisis: sensitive (sensitive), when certain functions develop according to the principle “better now than later”. Critical periods have the principle: “now or never”.

Teacher: at the second stage of the lesson, you have to determine the patterns of age-related changes using graphs and tables.

Group 1. Age-related changes in heart rate (HR) and stroke volume of the heart.

Index

Newborn

Age (in years)

Heart rate

(Pulse per minute)

Stroke volume of the heart

Newborns have the highest heart rates and a minimum stroke volume of 2.5 cm3. In the first year of life, the stroke volume increases by 4 times, over the next 5 years by 2 times. In a 15-year-old, the heart rate corresponds to adult indicators, it is almost 2 times less than in a newborn, and the stroke volume is 20 times greater.

L. Tolstoy figuratively spoke about the pace of change: “From a 5-year-old child to me there is only one step, from a newborn to a 5-year-old - a terrible distance. From the fetus to the newborn - the abyss.

Group 2 Age-related changes in lung capacity (VC) from 20 to 80 years.

Women and men have initially different indicators. The general trend: the maximum indicators at the age of 25, a decrease after 35. After 45 years, the decrease in VC in women is more pronounced. The maximum indicators for men are 3800, for women 3000. The minimum indicators for 75 for men are 3000, for women 1800.

Group 3. Changes in some signs of a person with age. (Attachment 1)

General trends:

1) Decrease in indicators from the age of 35;

2) Periods of decline alternate with periods of relative stabilization;

3) Changes in each system have their own critical years and are not simultaneous for the organism as a whole.

For scientific texts, select literary passages and reproductions of paintings.

Group 4 Text.

Infancy (under 1 year of age)

Biological changes: overgrowth of the fontanel, maturation of the muscles of the neck and trunk, the child can hold his head, tries to sit; maturation of the muscles of the legs allow you to move independently, first crawl, then get up. At 2 months, a smile appears. Visual and auditory concentration arises, at 3 months - "cooing", at 6 - the beginning of babbling and understanding one's name, at 9 - joint game activity with adults, mastering gestural farewell, at 12 - understanding of some generalized commands. There is a formation of binocular vision (from 13 weeks to 2 years). If a child has strabismus or one eye is damaged and the defect has not been eliminated during this time, then this person will never see completely.

Early age (1-3 years).

Self-acquaintance with the environment, through trial and error, different methods of action are mastered. The child learns the symbolic properties of objects by imagining that the cube is a machine and the doll is a person. By the age of 1.5 he says 100 words, at 2 years - 300, at 3 years - 1500 words. In the second year, children learn to speak, understand the symbolic meaning of words. This is illustrated by the lines of S. Marshak:

When, having experienced the difficulties of teaching,
We start putting words together
“Water. Fire. Old man. Deer. Grass".
And we understand that they have meaning ...

The next age is called preschool childhood. The child quickly expands his abilities: he eats, dresses, learns to ride a bicycle, draw, cut with scissors. Masters the first abstractions: geometric shapes, calendar, time. Account, letters. Vocabulary - 2000 words. Asks a lot of questions. S. Marshak, describing this period, wrote:

He plagued adults with the question “why?”
He was nicknamed "the little philosopher"...

Junior school age (7-10 years old).

The whole way of life changes dramatically, permanent duties appear, the circle of contacts expands. By the beginning of training, the child develops a certain self-esteem, work manners, and skills in relationships with others. The last period of childhood proceeds smoothly, without any crises. At this age, there is a minimum of illness and psychological trauma. Friendship is born, the first betrayals shake. There are own ideas about what is “good and what is bad”.

Adolescence - transitional (12-15 years).

Puberty leads to growth and disproportion of body parts, hormonal status changes, secondary sexual characteristics are formed. Man does the work of rebuilding the soul himself. A teenager is absorbed by himself, he is tormented by fears, doubts. M. Tsvetaeva figuratively expressed this in verse.

They ring - they sing, depriving oblivion,
In my soul the words: "fifteen years"
Oh, why did I grow big?
There is no escape!…
What's ahead? What failure?
Everything is deceit and oh, everything is forbidden!
So with a sweet childhood I said goodbye crying
At fifteen.

In a short period, he turns from a child into an adult. The body, the psyche, relationships with others are changing, this does not happen at the same time. A biologically mature person can remain a child for many more years due to the state of his soul and position in society. The difficulties of adolescence are connected not only with physiology. The position of the adolescent in our culture is ambiguous. In ancient times and in surviving archaic cultures, a person who reached puberty became a full-fledged member of society. In the Masai, at the age of 15, a teenager is being prepared for the transition to a group of tribal defenders - the status of an adult. Transition - initiation is accompanied by trials. Woe to the one who gives out with a sound how much it hurts him, then he will remain an eternal child, a sub-shepherd will carry out any assignments of his peers. In the 18-19th century in Russia, a 10-year-old girl was left with the whole house, looking after small children, and a 15-year-old became a full-fledged adult worker.

Text Youth (16-20).

Physiological maturation is completed (complete ossification occurs), appearance and well-being improve. A person acquires the fullness of physical and intellectual capabilities. There is no longer any difference between the thinking of a young man and an adult. Creative abilities flourish, at this time the highest achievements in sports. But age is characterized by anxiety, a heightened need for understanding. Loneliness, jealousy, resentment is experienced very sharply. Crisis 17-18 years.

Maturity.(20-65)

A long stage between youth and aging (from 20 to 65 years) Allocate: youth (20-30) - the time of self-assertion in love, career, family, society. Pushkin A.S. wrote:

Am I about thirty years old?
So, my afternoon has come ...

Stabilization period (35-43). Everything that has been achieved is consolidated. A person knows himself and his capabilities, appreciates today. Then a critical decade comes, depressive moods arise, fatigue from boring reality, life achievements are overestimated. People are going through a mid-life crisis. Pushkin A.S. wrote:

But it's sad to think that in vain
We were given youth
What cheated on her all the time
That she deceived us
That our best wishes
That our fresh dreams
Decayed in rapid succession
Like leaves in autumn rotten.

The period ends with psychological and physical balance, when there is a departure from active work and social life.

Old age (60-75).

All biological changes occurring during this period are unpleasant. The main task is to realize your age, to accept yourself as you are. Life position changes from active to passive. After 60, people perceive the world as more dangerous and complex than when they were young. Hence the characteristic features of older people: conservatism, caution, legibility. This is the age of loss - friends, relatives, loved ones die. There is a special relationship with time. He has been lacking all his life, and now he needs to be “spent”.

Old age (after 75)

A noticeable deterioration in health, a reduction in body length, a pronounced increase in stoop, a decrease in muscle strength. The appearance of wrinkles.

A person rethinks his whole life, either accepts it as fate, or realizes that life was in vain. Figuratively in the proverb: “Old age is a bitter winter for the ignorant and a harvest time for the wise.”

Teacher: Biological processes occur involuntarily, the restructuring of the soul depends on the activity of everyone, and the change in social status is provided for by the structure of society. A person in different periods masters social roles. Age of assimilation of such roles depends on the society. In the old days in Russia, 15-year-olds were considered independent adults, at the age of 20 they became statesmen. Now 20-year-olds are considered not mature enough to lead others, to be leaders in the professional field, to start a family. Different countries set different time frames for entering school, coming of age, selectivity, and retirement. A person can biologically go through different stages, but not reach social maturity. People say: “Who is a man at the age of 10, and who is a child at the age of 40”. A person who has reached social maturity follows the norms of society, if he shares them, rebels against them, if he does not agree. And sometimes he is able to change the most unshakable rules.

Teacher: What conclusions can we draw from the lesson?

  1. Age-related changes are due to various factors.
  2. The pace of age-related changes is individual.
  3. Age changes depend on gender.
  4. Age-related changes in different organ systems do not appear simultaneously, heterochronously.
  5. In the early stages of ontogeny, the rate of age-related changes is several times more intense than at other times.
  6. Biological changes arise involuntarily, psychological changes depend on the activity of the individual, and the society sets the roles and framework for social changes.

Homework: find characteristics of different ages from literary sources.

Literature:

  1. Bezrukikh T.T., Sonkin V.D., Farber D.A. Age physiology M.: publishing center "Academy", 2002
  2. Smirnova N.S. Solovieva V.D. Biological age of a person - M .: Knowledge, 1986
  3. Tolstykh L. Ages of life. Moscow: Young Guard, 1988
  4. Khripkova A.G. et al. Age physiology and school hygiene-M .: Education, 1990
  5. Encyclopedia for children vol. 18 Man. Part 2 - M .: Avanta, 2003

slide 1

Topic: "Age periodization of human mental development"

slide 2

Neonatal crisis 0 - 2 months
The transition from intrauterine to extrauterine lifestyle, complete dependence on an adult. Social smile as the beginning of individual mental life

slide 3

Infancy 2 months - 1 year
The social situation of development The situation of the emotional unity of the child and the adult ("we")

slide 4

:
The need for communication Basic trust in the world Differentiation of sensations and emotional states Distinguishing between close and strangers Intentional actions (grasping, getting an object) “True” imitation Objective perception Autonomous speech Walking Motivational representations. The transformation of the child into the subject of desire and action

slide 5

Key Concepts
Biological helplessness, anticipatory adult initiative, bonding, Unconditioned and conditioned reflexes, social smiling, maximally social being, animation complex, hospitalism, communication deficit, need for new experiences, preverbal communication, cooing, cooing, babble, passive and active speech, progressive and dead-end movements, simple manipulations, etc.

slide 6

Crisis 1 year
Physical separation from mother. Expanding the space available to the child. The growth of independence. Hypobulic reactions: the first acts of protest, opposing oneself to others, the so-called hypobulic reactions, in which will and affect (L.S. Vygotsky) are not differentiated, which are especially revealed when something is denied to the child (shouts, falls to the floor, pushes adults, etc.)

Slide 7

Early childhood 1-3 years
The social situation of development Child and adult (concrete, from a close environment), or "I and the other", or Child - Object-Adult. Knowledge of the world of human objects. Leading activity Tool-object (object-manipulative) Communication with an adult is situational-business, with peers - initial forms, mutual imitation.

Slide 8

Psychological neoplasms
Mastering object actions Symbolic, substituting action Object game Initial stages of visual and other types of productive activity Active speech Visual-effective thinking Personal action Consciousness "I myself" Separating myself from others and comparing myself with them

Slide 9

Key Concepts
Situational behavior, socialization, instrumental actions, correlating actions, external orienting actions, polyfunctional objects, situational speech, passive speech, scribble stage, cephalopod stage, aggressiveness, involuntary attention, involuntary memory, etc.

Slide 10

Crisis 3 years
"Seven-star symptoms of a crisis": stubbornness, negativism, obstinacy, protest rebellion, self-will, devaluation of adults, despotism, psychological separation from a close adult. "Pride in Achievement"

slide 11

Preschool childhood 3 - 7 years
Social situation of development Child and adult (social, generalized). Cognition of the world of human relations Leading activity Game (role-playing game) Communication Communication with adults: 3-5 years - extra-situational-cognitive; 5-7 years - extra-situational-personal. Communication with peers - game cooperation, empathy

slide 12

Psychological neoplasms
Imagination Visual-figurative thinking Beginnings of conceptual thinking Picture of the world New motives of behavior Subordination, hierarchy of motives Arbitrariness of behavior Primary ethical instances Self-awareness Self-assessment Practical mastery of speech, development of speech functions

slide 13

Key Concepts
egocentric thinking, egocentric speech, contextual speech, artificalism, animism, decentration of thinking, sensory development (acquisition of sensory standards), game role, game content, plot, game with rules, dramatization game, director's game, identification, etc.
The ability to replace, the symbolic function of consciousness, conditionally dynamic position, orientation to the meaning and nature of human relations, the ability to meaningfully focus on the position of another person,

Slide 14

Crisis 7 years
Loss of childish spontaneity (mannering, antics). Generalization of experiences and the emergence of inner mental life, occupation. The ability and need for social functioning, in occupying a significant social position

slide 15

Junior school age 6-7-10 years
The social situation of development The internal position of the student as a person who improves himself Leading activity Educational activity Communication Peculiarities of educational communication: the role of the teacher, the role of peers. Joint discussion of educational problems

slide 16

Psychological neoplasms
“The ability to learn” Conceptual thinking Internal action plan Reflection - intellectual and personal A new level of arbitrariness of behavior Self-control and self-assessment Orientation towards a peer group Dependence of the level of achievements on the content and organization of educational activities

Slide 17

Key Concepts
Psychological readiness for school, personal readiness, mental readiness, sense of competence, cognitive motives, motives for self-improvement, school adaptation and maladaptation, school phobia, school anxiety, academic failure, work, latency period, etc.

Slide 18

preteen crisis
"Motivational Vacuum". Crisis of self-esteem. Breaking the old system of relationships, changing the entire structure of experiences. Reflexive turnover on oneself

Slide 19

Adolescence, adolescent age 10-11-14-15 years
Social situation of development Formation of a conscious attitude towards oneself as a member of society. Favorable conditions (sensitivity) for the manifestation of individuality Adolescent group as a psychological space for the emergence of the main neoplasms of adolescents. Leading activity Intimate - personal communication of peers (D.B. Elkonin.) Communication in socially useful activities (D.I. Feldstein) Communication The desire to occupy a satisfying position in a peer group. Adolescent and adults: relationship ambivalence, the desire for independence and the need for protection and support.

Slide 20

Psychological neoplasms
The feeling of adulthood is a new level of self-consciousness The desire for self-affirmation The emergence of inner life, a great interest in the feelings and experiences of other people "I-concept" Formal-logical (reasoning) thinking Reflection

slide 21

Key Concepts
"Hormonal storm", puberty, puberty, identity, character (personality) accentuations, reference group, leadership, camaraderie code, "personal myth", "imaginary audience", adolescent egocentrism, coping strategies, conflicts, core interests

slide 22

Crisis of transition to adolescence (15-18 years old)
The formation of a person as a subject of his own development

slide 23

Youth Early - 15-17 years. Late - 17-21 years.
Social situation of development Search for one's place in a wider social community, the beginning of practical self-realization. The process of self-determination as an affective center of the social situation of development Leading activity Educational and professional activity. Professional self-determination Communication The need for informal, confidential communication with elders. Friendship. Establishing relationships with people of the opposite sex. Love

slide 24

Psychological neoplasms
Need for self-determination Readiness for personal and professional self-determination Life plans Stable self-awareness Identity Value orientations Worldview Internal position of a man or woman

Slide 25

Key Concepts
Adulthood, life tasks, social roles, model of typical life path, role mixing, identity diffusion, psychosocial moratorium, abstract thinking, philosophical reflection, awareness of one's own uniqueness, meaning of life, youthful maximalism

slide 26

Crisis of transition to adulthood (18-20 years old)
"A break from parental roots"

Slide 27

Adulthood: youth and maturity Early adulthood (youth, "entering maturity") - 20-30 years. Average adulthood (maturity) - 30-60 years
Social situation of development Taking full responsibility Leading activity Labour. The maximum realization of the essential forces of man. The range of the main areas of activity - work, family, communication - remains constant, but their ratio changes. Communication Circle of communication associated with professional activities. Development and implementation of marital and parent-child relationships

Slide 28

Psychological neoplasms
Building a life strategy Phenomenon of acme Meaningful decisions in life A new level of intellectual development (the ability to formulate problems yourself, dialectical thinking) Motherhood / fatherhood

Slide 29

Key Concepts
Adulthood, maturity, self-actualization, individuation, individualization, individual life style, acme, acmeology, career, professionalism, generativity, parenting styles, system of social roles, autobiographical method, crisis model, transition model

slide 30

Regulatory crises of maturity
The crisis of the 30th anniversary is a correction of the life plan, the creation of a more orderly structure of life both in professional activity and in the family; crisis of the 40th anniversary (mid-life crisis) - awareness of the loss of youth; doubts about the correctness of the life lived as the central problem of age; Crisis of 50 years (Crisis of the "empty nest") - Adult children leave the parental family and begin an autonomous life, the married couple loses the meaning of existence. Decreased physical attractiveness and sexual activity.

Key Concepts
Gerontology and orthobiotics - sciences of old age and proper lifestyle, retirement shock, aging strategies, active and passive aging, old age typologies, liberation from "sexual slavery", memory changes, psychological time in old age, attitude towards death, despair or happy old age.

slide 34

Crisis of individual existence
Death as the last critical event in life. Attitudes towards death

Slide 35

EXERCISE:
Topics of reports: Psychological features of adolescence. Psychological features of adolescence. Adulthood and acme. age crises. Reflection of the psychology of different ages in the works of world art. Age features in folk culture and folklore.

slide 36

Recommended literature (available in the RSSU library)
Shapovalenko, Irina Vladimirovna Age-related psychology(Psychology of development and developmental psychology): textbook. for stud. universities, education for example and special psychology / I. V. Shapovalenko; rec. : L. F. Obukhova, O. A. Karabanova. - M. : Gardariki, 2009. - 349 p. Kulagina, Irina Yurievna Developmental psychology: human development from birth to late maturity: textbook. allowance for students. higher spec. textbook institutions / I. Yu. Kulagina, V. N. Kolyutsky; rec. : V. P. Zinchenko. - 2nd ed. - M. : TC Sphere, 2008, 2009. - 464 p. : ill. 70 Developmental psychology: childhood, adolescence, youth: reader: textbook. allowance for students. universities / comp. and scientific ed. : V. S. Mukhina, A. A. Khvostov. - 7th ed., revised. and correct. - M. : Academy, 2008. - 624 p. 50 Obukhova, Lyudmila Filippovna. Developmental psychology: textbook. for stud. universities / L. F. Obukhova. - M.: Higher education: MGPPU, 2009. - 460 p. Developmental and pedagogical psychology: reader: for students. higher ped. textbook establishments / comp. : I. V. Dubrovina, A. M. Parishioners, V. V. Zatsepin. - 5th ed., erased. - M.: Academy, 2008. - 368 p. 61 Elkonin, Daniil Borisovich. Child psychology: textbook. Allowance for students. universities / D. B. Elkonin; ed.-st. B. D. Elkonin. - 5th ed., erased. - M. : Academy, 2008. - 384 p. 34MO Socio-psychological features of parent-child relationships in incomplete paternal families [Electronic resource]: author. dis. ... cand. psychol. Sciences: 19.00.05 / Noskova Marina Vladimirovna; RSSU. - M.: [b. and.], 2010. - 21 p. Questions of Psychology: Bulletin of Moscow University. Series 14: Psychology: journal // eLibrary.ru Psychological journal: journal // eLibrary.ru

Physiology (gr. pfysis - nature and logic - teaching)
studies the vital activity of the whole organism
and parts (organs, cells) of the body, their interaction,
features of functioning in various situations
(rest, professional activity). Physiology
closely intertwined with such sciences,
like anatomy, cytology, embryology, biochemistry,
biomechanics,
medicine, psychology...
Age physiology was formed as
separate science, section of human physiology and
animals, studying the patterns of formation and
development of physiological functions, features of growth and
development of children and adolescents. She studies processes
ontogenetic development of an organism from prenatal
period up to adolescence.

Patterns of growth and development of the body

Ontogeny (from the Greek optos - being, individual; genesis - origin,
development) - the process of individual development of the organism from the moment
conception (fertilization of the egg) to death.
Allocate prenatal (antenatal), perinatal and
postnatal periods of ontogeny.
In the process of ontogenesis, the growth and development of the organism occurs.
Development is a process of quantitative and qualitative changes,
occurring in the human body, leading to an increase
levels of complexity of the organization and the interaction of all its
systems. Development includes three main factors:
growth,
differentiation of organs and tissues,
shaping (acquisition by the body of characteristic,
its inherent forms).
Growth is a quantitative process characterized by continuous
an increase in body weight and accompanied by a change
the number of its cells or their sizes.
A characteristic feature of the growth process of the child's body are
its unevenness and undulation.

The main biogenetic law - ontogenesis is a brief repetition of phylogenesis (the history of the development of a species). To the main regularities of ontoge

Basic biogenetic law -
ontogeny is a brief repetition
phylogeny (the history of the development of the species).
To the main rules
ontogenetic development include
uneven and continuous growth and
development, heterochrony and phenomena
advanced maturation is vital
important functional systems.
P. K. Anokhin put forward the doctrine of heterochrony (uneven maturation of functional
systems) and, following from it, the doctrine of system genesis. According to his ideas,
a functional system should be understood as a broad functional association
variously localized structures on the basis of obtaining the final adaptive
effect needed at the moment (for example, the functional system of the act
sucking, a functional system that ensures the movement of the body in space, and
etc.).
Functional systems mature unevenly, are switched on in stages, are replaced,
providing the body with adaptation in different periods of ontogenetic development.

Also, the main patterns of growth and development include:

- "energy rule of skeletal muscles" as a leading factor
systemogenesis (according to I.A. Arshavsky).
According to Arshavsky, the growth and development of skeletal muscles
is a leading factor in the unification of different body systems in
a single whole.
- reliability of the biological system (according to A.A. Markosyan).
Under the reliability of a biological system, it is customary to consider such a level
regulation of processes in the body, when their optimal
flow with emergency mobilization of reserve capabilities and
interchangeability, guaranteeing adaptation to new conditions
existence and a quick return to the original state.

Critical and sensitive periods of development

The transition from one age period to another is
a turning point in development, when the body passes from one
quality state to another. Spasmodic moments of development
the whole organism, its individual organs and tissues
called critical. They are tightly controlled genetically.
The so-called sensitive periods partially coincide with them.
(periods of special sensitivity) that arise on their basis and
the least genetically controlled, i.e. they are especially
susceptible to environmental influences, including
pedagogical and coaching.
Critical periods switch the body to a new level
ontogenesis, create a morphofunctional basis for the existence
organism in new conditions of life activity (for example,
activation of certain genes causes the occurrence
transition period in adolescents). During critical periods of development
sensitivity of the embryo to insufficient supply of its
oxygen and nutrients, to cooling,
ionizing radiation increased.

Sensitive periods adjust the functioning of the body
to new conditions (perestroika processes are being optimized in
various organs and systems of the body, harmonization is being established
activities of various functional systems is provided
adaptation to physical and mental stress at this new level
the existence of an organism, etc.). Associated with this is a high
sensitivity of the body to external influences in sensitive
periods of development.
Beneficial effects on the body during sensitive periods
optimally contribute to the development of hereditary
capabilities of the body, the transformation of innate inclinations into
certain abilities, and unfavorable ones delay them
development, cause an overstrain of functional systems, in
first of all, the nervous system, mental and
physical development.
Training influences during sensitive periods are most
effective. This results in the most pronounced development
physical qualities - strength, speed, endurance, etc., the best
how reactions of adaptation to physical loads occur, in
the functional reserves of the body develop to the greatest extent.

Acceleration is an important feature of age-related development at the present time.
Distinguish between epochal and individual acceleration.
Epochal acceleration is understood as the acceleration of growth, physical development,
puberty and mental development of the human body. They also use
the term secular trend (secular trend). This phenomenon has been observed in various
countries, in various cities and rural areas.
So, over the past 30-40 years in newborns, the body length has increased by 1.5-1 cm
and body weight - by 100-150g. At the age of 1 year, children became, on average, 5 cm longer and
1.5-2 kg heavier than 50-75 years ago.
Puberty has accelerated, secondary sexual characteristics are formed earlier,
1.5-2 years earlier, the first menstruation appears in girls, there are cases
early childbearing (from 8-9 years).
At present, girls and boys reach their maximum height at the age of 16-19, and 50
years ago they reached it by the age of 20-26.
It is believed that this phenomenon may be due to increased ultraviolet
irradiation (heliogenic theory), the effect on the endocrine glands of magnetic waves,
increased cosmic radiation, increased protein intake (alimentary
theory), increased intake of vitamins and mineral salts
(nutrigen theory), an increase in the amount of information received, especially in
urban living conditions. It is believed that natural factors may cause
periodic changes in human genetics, causing epochal outbreaks
acceleration.

Individual or intragroup acceleration, i.e. phenomena
accelerate the development of individual children and adolescents in certain
age groups. It is believed that acceleration is not a stage
progressive increase in the size of the human body, and
represents only a phase in its development.
Retardation - a phenomenon opposite to acceleration - deceleration
physical development and formation of functional systems
bodies of children and adolescents. At the present stage of study
There are two main reasons for retardation. First, various
hereditary, congenital and acquired in the postnatal
ontogenesis organic disorders; second - various factors
social character.
Hereditary retardants, as a rule, by the end of
growth processes are not inferior in this indicator to their peers,
they just reach these values ​​1-2 years later. Cause
lagging behind may also be past diseases, but they
lead to a temporary delay in growth and after recovery, the rate
growth become higher, i.e. the genetic program is implemented for
shorter period.

Periods of extrauterine development of the human body

I newborn - 1-10 days;
II infancy - 10 days - 1 year;
III early childhood - 1-3 years;
IV first childhood - 4-7 years;
V second childhood - 8-12 years old - boys, 8-11 years old - girls;
VI adolescence - 13-16 years old - boys, 12-15 years old - girls;
VII youth age - 17-21 years old - boys, 16-20 years old - girls.
VIII Mature age 1st period 22-35 (men); 21-35 (women);
2nd period 36-60 (men); 36-55 (women)
IX. Elderly age 61-74 years (men); 56-74 years (women);
X. Senile age 75-90 years (men and women);
XI. Long-livers - 90 years and older.

transport of a fertilized egg through the fallopian tube
before implantation (scheme).
1 - egg in the ampulla of the fallopian tube; 2 - fertilization; 3-7 -
different stages of blastomere formation; 8 - morula; 9, 10 -
blastocyst; 11 - implantation.

Implantation. a - blastocyst before implantation; b - initial contact of the blastocyst with the decidua of the uterus, c - immersion of the blasto

Implantation. a- blastocyst
before
implantation; b
- initial
contact
blastocysts with
decidual
shell
uterus, in
dive
blastocysts in
decidual
shell, g -
completion
implantation.

Position
embryo and
germinal
shells in different
periods
intrauterine
human development.
A - 2 - 3 weeks; B - 4
weeks:
1. amnion cavity
2. body of the embryo
(embryoblast)
3. yolk sac
4. trophoblast.
B - 6 weeks; G fetus 4 - 5 months:
1. fetal body
2. amnion
3. yolk sac
4. chorion
5. umbilical cord.

Intrauterine development

Skeleton Features

Skeleton Features
The primary basis of the skeleton is cartilage tissue, which gradually
is replaced by bone, and bone formation occurs as inside
cartilage tissue, and on the surface.
By the time of the birth of the child, the diaphyses of the tubular bones are already present
bone tissue, while the vast majority of epiphyses, all
spongy bones of the hand and part of the spongy bones of the foot still consist only of
cartilage tissue.
Bone fragments have a peculiar fibrous structure, are rich in
vessels and bone marrow. Bones are only approaching 2 years old
in structure to the bone of an adult.

Features of the skull of newborns

ossification of the skeleton

Ossification
skeleton
During the first
baby has no months
completely carpal
bones
Teething.
good indicator
correct development
serves pace
eruption
milk teeth.
Occasionally takes place
pretty early
teething, with
3-4 months and usually
is
constitutional
feature of children.
For the majority
healthy children
teething
starts at 6-7 months.
First
lower
middle incisors,
age 8-9 months
upper
middle incisors, and through
some time and
lateral superior and
lower incisors.
one year old baby
has 8 teeth
.

At 4–6 months, the child begins to sit up, first with the help of adults, then by himself. As this posture is mastered, kyphosis is formed in the thoracic region.

At 4-6 months, the child begins to sit up,
first with the help of adults, then on my own. By
as this posture is mastered, kyphosis is formed in
thoracic region. Later, at 8–12 months, when
the child begins to stand up and learns to walk, under
the action of muscles that maintain
vertical position of the body and
limbs, the main bend is formed -
lumbar lordosis

Development of the muscular system

The muscular system in infants is poorly developed. Muscle weight by
in relation to the weight of the whole body is less than:
in a newborn - 23.3%.
Muscles in children in appearance are paler and more tender, richer
water, but poorer in proteins and fat, and also
extractive and inorganic substances.
The muscles of the newborn are physiologically hypertonic, especially in the area
flexors, in the future the turgor weakens somewhat, but with the development of the child and
the improvement of movements is enhanced.
The development of the muscle of children is uneven. First of all at
they develop larger muscles, such as muscles
shoulders and forearms, while smaller muscles develop
later.
The joints of a newborn already have all the anatomical
joint elements. However, the epiphyses of the articulating bones
consist of cartilage, the ossification of which begins after
the birth of a child in the 1st-2nd years of life and continues until
youthful age.

The development of a child can be considered normal only if he has the right
movement is developing. First of all, muscle systems develop,
dedicated to the most important functions at the moment. Funkts. development is underway
top down. In a newborn, the head still hangs helplessly and dangles in everything.
sides. First of all, the child learns to hold and raise his head, then he not only
holds it, but also turns it in different directions under the influence of visual and auditory
impressions. This usually occurs as early as the 2nd month.
At first the child is completely helpless; by the end of the first month
there is already some improvement; by 2 months The child is now much more confident.
By 3-4 months. the child is already learning to sit with support, therefore mastering
function of the back and chest muscles. At the same time, the child makes the first grasping
attempts, learns to control his upper limbs. He knows how to reach out, take
objects and throw them. At first, he still does not have a strict differentiation of individual
muscle groups, movements are massive, erratic, grasping
usually done with the whole hand.
From the 4th month the child can already roll over on his stomach, lean on the handles and even
rise to his feet and hold on to them if, holding his hands, help him get up
and lean on your feet. By 5 months these movements are already more confident.
At 6 months, the child stands easily with support and sits completely freely without
support. By 7 months, the child learns to crawl on the bed, he stands on his feet.,
holding on to the edge of the bed. At the end of the year of life, the child already makes attempts on his own
walk, and some children walk quite well. Time to start walking
individually different. Children are well developed, with whom they work a lot and
they help, they usually start walking from 10-11 months; on the contrary, children who are given
little attention, they learn to walk only in the 2nd year.
Over the 3rd and 4th quarters of the year, the differentiation of individual
muscle groups. Grasping becomes more confident, predominance begins
using the right hand with the isolation of the index finger. At the end of the year the child
grabs well and holds tightly, picks up thin objects with two fingers, but still stretches
grasp flames and dripping water, begins to produce complex motor complexes,
perform simple actions, clap your hands, etc.

brain development

A child is born with a brain
weighing about 390 g. Cerebral
substance builds up rapidly
reaching up to 6 months. weight in 600-
700 g, by the end of the year the weight of the brain-
around 900. That is, for the first
year of life brain
increases by 21/2 times.
The child is born with
formed
segmental apparatus and
peculiar to him
automatic
reflex reactions,
the bark is underdeveloped and only in
late stages
formed and
acquires a dominant
role over all
functional
manifestations.

The formation of the first conditioned reflexes proceeds
relatively slowly, and they themselves
unstable, which is apparently due to the wide
irradiation in the cortex of the processes of excitation and
braking.
If in the first days after birth they appear
the first unconditioned orienting reflexes, then
starting from 3-4 months, formation occurs
conditional indicative (research)
reflexes, which later play an important role in
child's behavior.

The brain of a newborn is relatively large,
large furrows and convolutions are well expressed, but have a small height and
depth. There are few small furrows, and they appear after birth. Development
furrows and convolutions mainly occurs before 5 years. frontal lobe dimensions
relatively less than in an adult, but the occipital lobe is larger.
The cerebellum is poorly developed. The gray matter is poorly differentiated from
white. The myelin sheath of the fibers is poorly developed.
The spinal cord is more developed than the brain at birth.
During the first two years of life, the brain grows rapidly (by 2 years
up to 70 percent). In general, the increase in brain mass does not occur due to
the formation of new cells, and as a result of the growth and branching of dendrites and
axons. During the first two years of life, the area of ​​the cerebral cortex
increases by 2.5 times, mainly by deepening the convolutions. is increasing
and thickness of the cerebral cortex.
From the first day of life, the child can be found indicative and
protective reflexes to pain, sound, light, and other stimuli.
However, these reactions are poorly coordinated, often erratic, slow
flow and easily spread to a large number of muscles.
It is believed that in the first days of life, the reactions of the body are carried out without
involvement of the cerebral cortex and subcortical nuclei.
In newborns, the processes occurring in nerve cells are slowed down.
Excitation occurs more slowly, it spreads more slowly
nerve fibres. Prolonged or severe irritation of the nerve cell is easily
brings it to a state of inhibition.

During the neonatal period, there is still a complete absence of higher mental
functions and the presence of only lower sense organs and elementary movements: sucking,
smacking, yawning, swallowing, coughing, crying, impulsive, reflex and
instinctive movements. The tactile sphere, taste and smell are developed enough,
vision is imperfect due to lack of coordination, hearing is imperfect in the first days
By the end of the month, the child is already able to turn his head to those of interest to him.
subjects; the cry becomes more expressive; a smile begins to appear.
During the 2nd month. on the face of the child you can already catch the expression of pleasure,
displeasure, fright, surprise, at the end of the 2nd month the child tries to laugh, with
crying tears appear. During this period, certain dominant reactions occur,
expressed in the rapid and complete inhibition of the former before the impact of motor
reactions.
On the 3rd month, further improvement takes place, intensively develop
muscular sensations, and the child grabs everything and pulls it into his mouth. Pleasant melodic sounds
arouse the interest and pleasure of the child.
From 4 to 6 months. shows interest in the environment, recognition of familiar faces, objects.
Arbitrary attention increases, memory improves. There comes a period
experimentation. The child is already able to understand some acts, perform
simple deliberate movements, especially in the form of imitation of others. Cooing
amplifies, giving a combination of vowels and consonants. Emotional life is manifested in
the form of fear, anger, manifestations of love.
From 6 to 9 months, the child gets acquainted with the size, shape and distance, in a muscular-tactile way - he studies parts of his body. Visual and auditory spheres
improved, color discrimination begins. memory and attention
are improved, imitation and copying of sounds and gestures is enhanced. Child
loves to be in society, reacts to praise, shows a feeling of envy, jealousy. He
able to understand speech supports the conversation with a look, facial expressions, movement,
begins to babble the first syllables.
During the 4th quarter, understanding of words increases, the child pronounces many syllables
and individual simple two-syllable words. It is capable of producing complex
motor complexes.

Features of vision in newborns

On the 3rd week of intrauterine development, the laying of the eye occurs. At
the birth of a child, you can visually see that the eyes of the child are relatively
more body weight.
the vision of a newborn is subject to the formula 20/100 - this means that the baby
can see an object if it is at a distance of 20-30 cm from his face and
at eye level, no more. The baby sees objects somewhat blurry.
For the first two weeks, the baby sees very poorly, his eyes are able to distinguish
only colors are only at the "brighter-darker" level - this is because the muscles
the eye of the crumbs is still very weak, in addition, they are not fully formed and
neural connections between the optic nerve and the occipital cortex
brain.
Eye movements at birth are not yet coordinated. Every day
the baby learns to focus his vision on objects of interest to him. In newborns
babies' eyes can squint a little: converge "in a bunch" or scatter in
different sides - afterwards it should pass.
And only by the 2nd week you can observe the so-called "visual
concentration". Eye tracking of an object or a moving object
functions by 2 months, and at 3 months binocular vision is already developed, then
there is a child fixes an object with his eyes and traces its movement with two
eyes. The reaction of the pupil to light is manifested in the fetus as early as 6 months.
Some researchers believe that during the first weeks the baby sees
"flat" picture, there is no perspective effect, and it is upside down.
all newborns are farsighted, which is why they see better
removed items. The small field of view allows the infant
see only objects "in front of you", but if you move them sideways from the face
crumbs - he will stop seeing them.
The ability to raise and lower the eyes to see an object in a vertical
plane will come to him a little later - closer to the fourth month of life.

Natural childhood farsightedness

Hearing features

Sound perceptions are traced in
intrauterine development. This fact
confirmed when a strong beep
irritant that the mother perceives,
corresponds to the movement of the fetus and the increase in
him a heartbeat. At birth - reaction
to the sound - startle, mimic
twitching of facial muscles, opening of the mouth,
protrusion of the lips and ECG and EEG changes.
Hearing acuity in the newborn is reduced and
improves by the end of the 2nd year of life.
In infants, the auditory tube differs from
auditory tube of adults a number of signs.
The auditory tube is straight, without curvature and
bends, wide, directed horizontally,
cylindrical, short
newborns 2 cm long, in adults -
3.5 cm).
Growth in length is accompanied by a narrowing of its
lumen from 0.25 cm at the age of 6 months to 0.1 cm
in older children.
The isthmus of the tube is absent, and the pharyngeal
the mouth is bordered by a cartilaginous ring, gapes and
has the appearance of an oval or pear-shaped gap
3-4 mm deep. For older children and
adults, it is revealed only when
swallowing.

Features of the fetal circulation

The movement of blood through the placenta is part of a great circle
fetal circulation. From the placenta, the baby's blood enters the inferior cavum
vein, from there to the right atrium. From here, blood flows partially into the right
ventricle, and partly through the oval opening in the fetus between
atria into the left ventricle. From the right ventricle, blood enters
pulmonary artery. Then some of the blood goes to the lungs, but most of it through
the arterial duct pours into the aorta and then again goes in a large circle.
Thus, both ventricles perform the same work, pumping blood into
aorta. Left directly, and right through the ductus arteriosus. That's why
the thickness of their muscle layer is approximately the same.
After the birth and cutting of the umbilical cord, the connection with the mother is broken.
Due to the onset of oxygen starvation, excitation occurs
respiratory center and the first respiratory movements occur.
Stretching of the lungs leads to the expansion of the pulmonary capillaries. Besides,
the annular dermal fibers are strongly reduced in the wall of the arterial
duct, closing it. As a result, the blood from the right ventricle is completely or almost
goes entirely to the lungs. From there, blood flows through the pulmonary veins to the
left atrium, and, filling it, presses on the valve of the foramen ovale,
blocking the flow of blood from the right atrium to the left.
By the end of the intrauterine period, the ductus arteriosus begins
narrow due to the growth of the inner layer of its wall. After birth
the narrowing process goes even faster, and after 6-8 weeks it is completely overgrown.
Gradually, the oval hole also overgrows by accreting the valve to it.
The final closure of the foramen ovale occurs by 9-10 months of age, but
sometimes much later. Often a small hole remains for the entire
life, which doesn't really interfere with his work. The umbilical arteries and vein also
overgrow.

Features of the heart of an infant

Children experience continuous growth and functional
improvement of the cardiovascular system.
The heart of a newborn has a flattened oval or spherical
form due to insufficient development of the ventricles and relatively large
atrial sizes. Due to the high position of the diaphragm, the heart
the newborn is located horizontally. Right and left ventricles
identical in thickness, their walls are 5 mm. Relatively large
sizes have an auricle and the main vessels.
In young children, the heart muscle is undifferentiated and
consists of thin, poorly separated myofibrils that contain
a large number of oval nuclei. Cross striation
missing. The parts of the heart also grow unevenly. left ventricle
significantly increases its volume, already by 4 months it doubles in weight
exceeds the right. The heart takes an oblique position by the first year
life.
By the end of the first year, the weight of the heart doubles. Children have a heart
higher than in adults. Heart mass in boys in the first years of life
more than girls.
Only by the age of 10–14 does the heart acquire the same shape as in an adult
person.

Heart rate in infants
-
in newborns 135 - 140 beats / min;
- at 6 months 130 - 135 beats / min;
- At 1 year 120 - 125 beats / min.
blood circulation indicators
age
Minute
volume, ml
Sisto-liches-cue
volume, ml
Newborn
(body weight 3000g)
560
4,6
1 month
717
5,3
6 months
1120
9,3
1 year
1370
11,0
Arterial
pressure, mm
rt. Art.
80-90/50-60

Features of the child's respiratory system

The nose, like the entire facial part of the skull, in a young child has
relatively small sizes. The nasal passages are narrow. inferior nasal passage
in children of the 1st year of life is almost absent, since the lower shell
appears in the form of a small roller. The choanae are relatively narrow, which
predisposes to rhinitis.
The nasal mucosa in young children has a delicate
structure. It is richly supplied with small blood vessels, in
therefore, even slight hyperemia leads to its swelling and
more narrowing of the nasal passages, which makes it difficult to breathe through the nose.
The tear-nasal duct is wide at an early age, which contributes to
penetration of infection from the nose and the occurrence of conjunctivitis.
In newborns, the lymphatic ring is underdeveloped. In children
1st year of life, the tonsils are located deep between the arches and do not
protrude into the oral cavity.
The larynx in newborns and young children, compared with
adults, relatively short and wide, funnel-shaped,
with tender, pliable cartilage and thin muscles. Located
she is high. The larynx grows especially intensively in the 1st year of life and in
puberty.
The trachea in a newborn is slightly higher than in
The adult bronchi are a continuation of the airways.
In the first year of life, the number of muscular bronchi is small.

Lung Development

In newborns, the lung volume is 65-67 ml.
The lungs grow continuously, mainly due to
increase in alveolar volume. Lung mass
increases most in the first 3 months of life and in
13–16 years old. Almost parallel to the growth of the mass goes
increase in total lung volume. Histological
lung tissue structure in young children
characterized by a significant amount of loose
connective tissue and poor elastic
fibers.
The main structural units of the lung are the acini.
consisting of the respiratory bronchioles of the first,
second and third order, in young children
have wide openings (sacculuses) and contain
few alveoli.
The number of alveoli in a newborn is less than half,
than a 12-year-old child, and is 1/3 of the amount
them in an adult.

Features of the stomach in children

Features of the stomach in children
In infancy, the stomach is located horizontally. As you grow and
development during the period when the child begins to walk, the stomach gradually
assumes a vertical position, and by the age of 7-10 it is located in the same way
like adults. The capacity of the stomach gradually increases: at birth, it
is 7 ml, at 10 days - 80 ml, per year - 250 ml, at 3 years - 400-500 ml, in
10 years - 1500 ml.
A feature of the stomach in children is the weak development of its bottom and
cardiac sphincter against the background of good development of the pyloric region. it
contributes to frequent regurgitation in a child, especially when air enters
into the stomach during suckling.
The mucous membrane of the stomach is relatively thick, against the background of this
there is a weak development of the gastric glands. Active glands
gastric mucosa as the child grows, and
increase 25 times as in the adult state. In connection with these
features of the secretory apparatus in children of the first year of life is developed
not enough. The composition of gastric juice in children is similar to adults, but
its acidic and enzymatic activity is much lower. barrier naya
the activity of gastric juice is low.
The main active enzyme of gastric juice is rennet.
the enzyme chymosin (labenzyme), which provides the first phase
digestion - curdling of milk.
Absorption in the stomach is negligible and concerns substances such as salts,
water, glucose, and only partially absorbed protein breakdown products.
The timing of the evacuation of food from the stomach depends on the type of feeding. Women's
milk is retained in the stomach for 2-3 hours.
LIVER: features in children
The liver of a newborn is the largest organ, occupying 1/3 of the volume

Features of the endocrine glands

The thyroid gland is one of the first organs
which can be distinguished in the human embryo. germ
it appears on the 3rd week of embryonic development in the form
thickening of the endoderm lining the bottom of the pharynx.
In an embryo 23 mm long, the thyroid gland loses its
connection with the throat.
In a newborn, the mass of the thyroid gland ranges from 1
up to 5 g. It decreases somewhat by 6 months, and then
begins a period of rapid increase, lasting
up to 5 years.
The total mass of the parathyroid glands in a newborn
fluctuates from 6 to 9 mg. During the first year of life, their total
weight increases by 3-4 times.
In a newborn, the mass of the pituitary gland is 0.1-0.2 g, at 10 years old it
reaches a mass of 0.3 g, and in adults - 0.6-0.9 g. During
pregnancy in women, the mass of the pituitary gland can reach 1.65