Across
- 5. amount of air that enters the lung during one normal cycle
- 8. collapsed lung
- 10. air sacs
- 12. spaces within the skull bones
- 14. prevents food entering airway
- 16. windpipe
- 18. illness caused by smoking
- 19. part of the larynx containing vocal cords
Down
- 1. lack of oxygen in tissues
- 2. space at the back of the oral cavity
- 3. cavity where lungs sit
- 4. how oxygen enters blood stream in alveoli
- 6. this lung is slightly smaller
- 7. tubes from trachea to lungs
- 9. inflammation of air passages
- 10. pause in breathing during sleep
- 11. bones that divide the nasal cavity
- 12. divides left and right nostrils
- 13. main muscle used for breathing
- 15. voice box
- 17. spasm of the diaphragm