HUMAN SEXUAL CHARACTERISTICS

There are two types of human sexual characteristics:

-Primary sexual characteristics enable human beings to reproduce. We have these when we are born.

-Secondary sexual characteristics differentiate men and women. They develop at puberty.

  - Men have lower voices, more developed muscles and a lot of facial and body hair.

  - Women have higher voices, breasts, wider hips and little body hair.

PUBERTY

Puberty occurs when the reproductive system matures, and secondary sexual characteristics appear.

Puberty starts when the pituitary gland sends hormones to the genital organs.

As a result of this, changes occur in boys and girls and their secondary sexual characteristics develop.

- Girls reach puberty between the ages of 11 and 14.

- Boys reach puberty between the ages of 13 and 15.

ACTIVITY "SEXUAL CHARACTERISTICS"

ANSWER THE FOLLOWING QUESTIONS:

1. When do secondary sexual characteristics develop?

2. Do men or women have more facial and body hair?

3. What gland sends hormones to the genital organs?

4. Which sexual characteristics do we have when we are born?

THE REPRODUCTIVE SYSTEM

Both the male and female reproductive systems consist of internal and external genital organs.

THE FEMALE REPRODUCTIVE SYSTEM

The female internal genital organs are:

- The ovaries:they produce the eggs necessary for reproduction.

- The Fallopian tubes: they connect the ovaries to the uterus.

-The uterus:is the organ where the baby develops during the pregnancy.

-The vagina: it is a channel which goes from the uterus to the outside of the body.

The female external genital organs have a collective name- the vulva.

The vulva includes creases of skin called labia, the clitoris, and the openings to the vagina and the urethra.

THE MALE REPRODUCTIVE SYSTEM

The male internal genital organs are:

- Two testicles or testes: They produce the sperm cells necessary for reproduction.

- The vas deferens: sperm travels through this tube to the uretha.

- The urethra: sperm travels through this passage to the outside of the body.

- The semical vesicles and the prostate gland: they produce a liquid to feed and transport sperm.

The male external genital organs are:

- The scrotum: it is a bag of skin which contains the testicles.

- The penis: the urethra passes through this organ.

ACTIVITY " THE REPRODUCTIVE SYSTEM"

READ THE DEFINITIONS AND WRITE THE CORRESPONDING WORDS

1. These organs produce sperm cells.

2. This is the bag of skin which contains the testicles.

3. This is the organ where the baby develops during pregnancy.

4. These connect the ovaries to the uterus.

5. These organs produce the female eggs necessary for reproduction.