human body system

2. tiny sacs of lung tissue specialized for the movement of gases between air and blood
6. A collection of tissues that carry out a specialized function of the body
12. stores urine
13. A muscular tube that connects the mouth to the stomach.
14. Found in the kidney, little filter that blood goes through.
16. tiny finger-shaped structures that cover the inner surface of the small intestine where digested food is absorbed
17. A blood vessel that carries blood away from the heart
18. smallest blood vessel; connects arteries and veins
19. group of organs that work together to perform a specific function
20. large muscular sac that continues the mechanical and chemical digestion of food

1. liquid part of the blood
3. lower chamber of the heart
4. A blood vessel that carries blood back to the heart.
5. Allows air to pass to and from lungs (windpipe)
7. The passages that direct air into the lungs
8. a cell fragment that plays an important part in forming scabs
9. where digestion begins
10. Filters waste from the blood like urea, water, salt and proteins.
11. Large, flat muscle at the bottom of the chest cavity that helps with breathing
12. Airways in the lungs that lead from the bronchi to the alveoli.lung
15. The basic unit of structure and function in living things
17. upper chamber of the heart