Human Body Systems

7. Airways in the lungs that lead from the bronchi to the alveoli.
8. Allows air to pass to and from lungs (windpipe)
9. Tiny finger-shaped structures that cover the inner surface of the small intestine where digested food is absorbed
10. a cell fragment that plays an important part in forming scabs.
11. Brings oxygen into the body. Gets rid of carbon dioxide.
12. the system that removes cellular waste from your body and controls water balance
13. tiny sacs of lung tissue specialized for the movement of gases between air and blood

1. Breaks down food into smaller molecules. Absorbs these nutrients into the body.
2. The passages that direct air into the lungs
3. smallest blood vessel; connects arteries and veins - is where stuff is being delivered and picked-up.
4. Organ where most absorption of food takes place
5. Transports oxygen, waste, nutrients, hormones, heat, etc... around the body
6. large muscular sac that continues the mechanical and chemical digestion of food
14. An organ that exchanges oxygen and carbon dioxide with the blood