Adolescents should be careful about what they eat, because

1. proper diet develops their brains.
2. proper diet is needed for the rapid growth taking place in their body.
3. adolescents feel hungry all the time.
4. taste buds are well developed in teenagers.

Reproductive age in women starts when their

1. menstruation starts.
2. breasts start developing.
3. body weight increases.
4. height increases.

Write notes on :

(a) Adam's apple.

(b) Secondary sexual characters.

(c) Sex determination in the unborn baby.

Word game : Use the clues to work out the words.

Across
3. Protruding voice box in boys.
4. Glands without ducts.
7. Endocrine gland attached to brain.
8. Secretion of endocrine glands.
9. Pancreatic hormone.
10. Female hormone.

Down
1. Male hormone.
2. Secretes thyroxine.
3. Another term for teenage.
5. Hormone reaches here through blood stream.
6. Voice box.
7. Term for changes at adolescence.