Across
- 2. diaphragm relaxes and decreases thoracic space
- 3. respiration exchange of gases in lungs
- 5. serve as a common passageway for both food and air
- 7. c-shaped cartilage rings with smooth muscle
- 8. air sacs
Down
- 1. movement of air
- 4. respiration exchange of gases within cells of the body organs and tissues
- 6. voice box