The Respiratory System

2. The upper throat behind the nose and mouth.
5. The toxic gas that is filtered out of the blood.
7. The gas that is absorbed into the blood and sustains life.
9. The tiny bubble-shaped sacs of the lungs that exchange gases from the blood.
13. Groups of muscles existing between and around the ribs that form the chest wall.

1. The thin tube carrying air from the throat.
2. Inflammation and fluid buildup in the air sacs of the lungs, typically caused by an infection.
3. The dome-shaped muscle below the chest cavity that aids breathing; vocal coaches will tell singers to use this when singing.
4. A small flap that prevents food or liquids from being inhaled.
6. A condition in which the air sacs of the lungs are damaged.
8. The curved bones attached to the spine which protect the organs in the chest cavity.
10. The tubes that transport incoming air into the lungs.
11. A condition that causes inflammation and sudden tightening of the airways.
12. Thin hairlike formations in the airways that catch microbes and debris.
14. The muscular organ that allows air to pass through the windpipe and also holds the vocal cords.