organ system

4. to digest food
5. controls thoughts, memory, etc
9. a subsystem of the circulatory system in the vertebrate body.
10. relax and expand to store urine, and contract and flatten to empty urine through the urethra.
11. Temporarily store food. Contract and relax to mix and break down food.
12. your body's outer layer,
13. carry food and liquid from your mouth to your stomach
15. pumps blood from the heart to the lungs to get oxygen.
16. help the body digest food and liquids.
18. two bean-shaped organs, each about the size of a fist.
19. Their predominant function is contractibility.
21. allows us to breathe
22. your body's central framework.

1. highly complex part of an animal that coordinates its actions and sensory.
2. Provides a protective barrier against mechanical, thermal and physical injury and hazardous substances.
3. glands that help you breath.
6. to produce eggs and sperm.
7. to remove waste from the body.
8. regulates most chemical levels in the blood and excretes a product called bile.
14. pumping blood around your body as your heart beats
17. is a complex network of glands and organs.
20. it fights invading germs in the blood