Across
- 1. tubes from trachea to lungs
- 5. opening with vocal cords
- 6. keeps alveoli from collapsing
- 7. where cellular respiration takes place
- 10. space at the back of the oral cavity
- 12. respiratory center of brain
- 15. spasm of the diaphragm
- 17. illness caused by smoking
- 18. divides left and right nostrils
- 19. spaces within the skull bones
- 21. muscle used for breathing
- 22. inflammation of air passages
- 23. collapsed lung
- 24. pause in breathing during sleep
Down
- 2. required for cellular respiration
- 3. lack of oxygen in tissues
- 4. cavity where lungs sit
- 8. bones that divide the nasal cavity
- 9. prevents food entering airway
- 11. air sacs
- 13. fluid build-up in air sacs, caused by altitude sickness
- 14. voice box
- 16. whooping cough
- 18. test that measures air volume
- 20. windpipe