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

Answers are as following:

Across

3. Protruding voice box in boys - Adam's apple
4. Glands without ducts - Endocrine
7. Endocrine gland attached to the brain - Pituitary
8. Secretion of endocrine glands - Hormone
9. Pancreatic hormone - Insulin (it decreases the blood sugar level).
10. Female hormones - Estrogen (it is important in the development of secondary sexual characters in females).

Down
1. Male hormone - Testosterone (it is important in the development of secondary sexual character in the male).
2. Secretes thyroxine - Thyroid 
3. Another form of teenage - Adolescence
5. Hormone reaches here through the bloodstream - Target site
6. Voice box - Larynx
7. Term for changes at adolescence - Puberty.