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