BODY SYSTEMS

1. A tube made up of rings of cartilage
5. The two cavities inside the nose
7. Where urine is produced; two bean-shaped organs
8. The process of removing the waste substances produced in the body
9. The structure that surrounds the lungs and the heart
11. The structure that pumps blood around the body
12. Tiny air sacs at the end of bronchioles; where gas exchange occurs
15. Two tubes that carry urine from the kidneys to the bladder
16. The gas that we breathe in; passes FROM the alveolus INTO the blood during gas exchange

2. Breathing out; lungs and ribcage get smaller
3. Two sponge-like organs
4. Where urine is stored
6. A tube that carries urine from the bladder to the outside of the body
10. Breathing in; lungs and ribcage get bigger
13. Contains the vocal cords
14. The gas that we breathe out; passes FROM the blood INTO the alveolus during gas exchange