Across
- 2. either of two small masses of lymphoid tissue in the throat
- 4. normal respiration
- 6. organs of respiration used to breath
- 7. sinus infection
- 9. membrane that covers the lungs
- 10. type of fibrous connective tissue
Down
- 1. lidlike cartilage overhanging the entrance of the larynx
- 2. amount of air breathed in and out with each breath
- 3. moving air into the lungs
- 5. respiratory organ containing nostrils
- 8. temporary cessation of breathing