Respiratory System

2. reduce friction when the lungs expand and contract during breathing.
3. irregular & uncontrolled growth of tumors in the lung tissue
7. makes up a vital part of the respiratory zone of the human lungs.
9. the membrane-lined cavity behind the nose and mouth
12. works as a valve to prevent food and liquids from entering your windpipe
15. severe allergic reaction characterized by the constriction of bronchioles
16. cavity moistens and filters air
17. a muscle situated between the ribs.
18. 2-inch long cartilaginous tube connecting the back of the nose
19. a flat sheet of muscle that is responsible for breathing.
20. Surrounded by the lips

1. any of the minute branches into which a bronchus divides.
4. expression applied to the volume of air
5. located in the upper portion of the lungs
6. preventing the exchange of gases
8. a condition in which air is abnormally present within the body tissues.
10. a volume of gas that remains in the lungs following a maximal expiration.
11. a large membranous tube
13. fine branching blood vessels that form a network between the arterioles and venules.
14. inflammation of the lining of the bronchioles