"Prelude to Youth - Physiological Development Characteristics of Puberty" PPT

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"Prelude to Youth - Physiological Development Characteristics of Puberty" PPT

1. A preliminary understanding of adolescence

What is adolescence?

Adolescence (12-18 years old):

It is the transition period from childhood to adulthood.

It is the “second peak” of human growth and development;

During adolescence, people's physiology and psychology will undergo drastic changes;

The main signs of puberty are: sexual development and sexual maturity.

2. Treat puberty development correctly

Stages of pubertal development:

Early stage: physical growth spurt

Middle stage: sexual organs and secondary sexual characteristics develop rapidly, menarche or nocturnal emission occurs for the first time;

Late stage: Gonadal development is basically mature, secondary sexual characteristics develop into adults, and physical development gradually stops.

Each period is about 2-4 years

Let’s talk about it:

In what ways does the human body change during puberty?

1. Rapid growth in height, weight and chest circumference

2. The functions of various organs in the body tend to mature;

(1) Enhancement of cardiovascular system functions:

1) Myocardial thickening, strong contraction, and increased stroke volume;

2) The weight of the heart increases 10 times that at birth;

3) Blood pressure is increased, and heart rate and pulse are close to those of adults.

(2) Enhanced lung function

1) Increased vital capacity. After the age of 18, the lung capacity of women is equivalent to 70% of that of men of the same age.

2) Reduced respiratory rate is an important sign of mature lung function 16-20 times/min

(3) The perfect functions of the brain and nervous system are as follows:

thinking ability,

Understanding ability and rapid development

judgment ability,

Memory capacity,

What is nocturnal emission?

Nocturnal emissions: refers to the phenomenon of ejaculation that occurs without sexual intercourse.

Nocturnal emissions: It is a natural physiological phenomenon that regulates sexual function.

Time of first nocturnal emission: around 14 years old.

Frequency of nocturnal emissions: It varies from person to person. Some people have 1-2 times a month or a week, because there are many factors that can induce nocturnal emissions.

Nocturnal emissions: It is a sign of male sexual maturity entering puberty.

When the reproductive organs mature, sperm will be produced. Usually the semen containing sperm is stored in the seminal vesicles. When the semen reaches a certain amount and there is no room for it in the body, it will be discharged from the body in the form of nocturnal emissions. Nocturnal emission marks the maturity of male reproductive function.

Male adolescent health care

Treat nocturnal emissions and masturbation scientifically

1. Underwear should not be too tight;

2. Don’t cover yourself with too thick a quilt when sleeping at night;

3. Consciously refrain from reading obscene books and periodicals and sexually stimulating scenes in movies and TV shows;

4. Treat masturbation correctly and correct bad behaviors;

5. Treat reproductive organ diseases promptly.

Discuss

Troubles in the flower season:

1. Does adolescence start early and end early?

2. I don’t know what masturbation is? But I dare not ask?

3. Can nocturnal emissions be seen?

4. Is it true that one drop of semen, ten drops of blood?

Message from youth:

Adolescence is the spring of our lives, and we all grow up slowly in the spring.

Adolescence is the golden period of life. Face your own changes correctly, calmly and happily;

Seize the golden period, actively exercise, supplement nutrition scientifically, and study hard.

Puberty is the beginning when men and women each own half of the world. We must understand the difference between men and women and the beginning of respecting ourselves and the opposite sex.

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Update Time: 2024-07-24

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