Human biology

1. The excretory system consists of the bladder and the ________.
3. There are 2 types of joints found including: ball and socket and _______.
4. Name the artery which takes blood from the heart to the kidneys.
7. The strong, smooth layer found at the end of bones to reduce friction.
9. Which organ is the site of gas exchange?
10. Name the system in the body that takes in oxygen and releases waste gases.
14. Name the organ found following the small intestine.
16. what term is used to describe the donation of organs from one person to another?

2. Describe what happens to the length of the muscle when it contracts.
5. name the bone found above the knee.
6. Name the liquid which consists of filtered excess water, salts and urea.
8. Name the structure which stores the urine before it is expelled.
11. the skeleton has many functions, including the ability to make what type of cell?
12. Name the organ which pumps blood around the body.
13. Which gas does the body breath in?
15. Name the part of the skeleton which protects the brain.