Across
- 2. throat passage for air and food
- 3. double membrane around lungs
- 5. cavity. filters warms and moistens incoming air
- 9. main muscle of respiration
- 11. reduces alveolar surface tension
- 13. hair like structures moving mucus
- 15. tiny air sacs for gas exchange
- 17. infectious disease of the lungs
- 18. gas essential for respiration
- 20. destruction of alveolar walls
Down
- 1. air in pleural cavity causing collapse
- 4. the tube carrying air from larynx to bronchi
- 6. voice box containing vocal cords
- 7. chronic airflow obstruction disease
- 8. smallest branches leading to alveoli
- 10. allergic airway narrowing
- 12. main air passages into lungs
- 14. infection filling alveoli with fluid
- 16. flap that closes trachea during swallowing
- 19. blood in pleural cavity