Human biology

5. Describe what happens to the length of the muscle when it contracts.
7. What term is used to describe the donation of organs from one person to another?
8. Name the organ which pumps blood around the body.
9. Name the bone found above the knee.
11. Name the liquid which consists of filtered excess water, salts and urea.
12. Which organ is the site of gas exchange?
14. The strong, smooth layer found at the end of bones to reduce friction.
15. Which gas does the body breath in?

1. Name the organ found following the small intestine.
2. Name the artery which takes blood from the heart to the kidneys.
3. The skeleton has many functions, including the ability to make what type of cell?
4. The excretory system consists of the bladder and the ________.
6. Name the part of the skeleton which protects the brain.
8. There are 2 types of joints found including: ball and socket and _______.
10. Name the system in the body that takes in oxygen and releases waste gases.
13. Name the structure which stores the urine before it is expelled.