Chapter 6

2. A bacterial infection of the lungs that can be fatal if untreated.
5. Very small tubes leading to the alveoli.
7. The process of taking air into the lungs.
10. A test to measure how much a person can inhale and exhale, and how fast they can exhale.
11. This dome-shaped muscle separates the thoracic and abdominal cavities.
12. A condition that causes a person to stop breathing during sleep.
15. The muscles between he ribs that assist in the expansion and contraction of the chest cavity during breathing.
19. The movement of air in and out of lungs.
21. A specialised system to improve the efficiency of oxygen and carbon dioxide exchanges in multi-cellular organisms.

1. Largest tube in the respiratory system that contains rings of cartilage.
3. The movement of the ribs during expiration.
4. A chemical component in e-cigarettes and cigarettes that makes smoking a highly addictive habit.
6. Movement of particles from an area of high concentration to an area of lower concentration.
8. An instrument used to listen to sounds in the lungs.
9. Most carbon dioxide is carried in the blood plasma in this form.
13. The process of breathing out.
14. Allergic response to foreign particles (dust, pollen) in the lungs.
16. Internal gas structures located in air-breathing vertebrates.
17. Type of cancer for which smoking is a significant cause.
18. Small air sacs where gas exchange takes place.
20. The gas that is removed during exhalation.