respiratory system

2. Exhalation of breath
4. tiny air sacs of the lungs
5. tiny hair-like structures on the surface of cells
11. the greatest volume of air that can be expelled from the lungs
12. A disease where the inner walls of the lungs' alveoli are damaged, causing them to eventually rupture
13. the body space between the thorax and pelvis
16. an infection in the lungs that causes the air sacs, or alveoli, of the lungs to fill up with fluid or pus
17. major air passages of the lungs
18. forming an air passage to the lungs and holding the vocal cord
21. a single breath
22. disease that affects your lungs that causes wheezing, breathlessness, chest tightness

1. what we breathe in
3. the volume of air remaining in the lungs after maximum forceful expiration
6. the drawing in of breath
7. extending from the larynx to the bronchial tubes and conveying air to and from the lungs
8. groups of muscles that run between the ribs, and help form and move the chest wall
9. the membrane-lined cavity behind the nose and mouth
10. human thoracic cage consisting of 12 pairs of these
14. muscular partition separating the thorax from the abdomen
15. what we breathe out
19. external openings of the nasal cavity
20. oxygen from the air that is inhaled is transferred into the blood