Human Body Systems

5. one of the many thin parts that control movement and feeling by carrying messages between the brain and other parts of the body
6. a hollow part or cavity in an organ, in particular.
9. small tube that carries blood to different parts of a person or animal's body
11. a large organ of the body that produces bile and cleans the blood
12. the large group of nerves which runs through the center of the spine and carries messages between the brain and the rest of the body
13. the tube that leads from the mouth through the throat to the stomach
15. either one of the two organs that people and animals use to breathe air

1. the organ in the body that holds urine after it passes through the kidneys and before it leaves the body
2. a long tube in your neck and chest that carries air into and out of your lungs
3. any one of the tubes that carry blood from the heart to all parts of the body
4. any one of the tubes that carry blood from parts of the body back to the heart
7. a long tube in the body that helps digest food after it leaves the stomach
8. the organ of the body in the head that controls functions, movements, sensations, and thoughts
10. a cell that carries messages between the brain and other parts of the body and that is the basic unit of the nervous system
14. the organ in your chest that pumps blood through your veins and arteries