Across
- 2. keeps food out of the airway
- 3. The C-shaped rings of the trachea are made of ___ cartilage
- 5. Respiratory disorders that narrow the airways are known as ____.
- 8. a cluster of alveoli
- 11. The ____ alveolar cells produce surfactant in alveoli
- 12. The ____ intercostal muscles are responsible for expiration.
- 13. prime mover of respiration
- 14. the voice box
Down
- 1. Produce mucus in the tracheal wall
- 4. warms, humidifies, and cleanses air in the nose
- 6. region of the pharynx with pseudostratified epithelium
- 7. These house alveoli.
- 9. This zone of the respiratory system allows air flow to pass without gas exchange
- 10. Total number of secondary bronchi