Across
- 1. bringing air into the lungs
- 4. hemoglobin bound to carbon dioxide
- 5. mucous membrane folds that produce sound
- 9. molecule needed by all living cells
- 11. turbinates that heat, moisten and filters air
- 12. organ for breathing
- 14. sending air out of the lungs
- 17. brain stem structure controls breathing muscles
- 19. pulmonary structures for gas exchange
- 20. parietal and visceral lung membrane
- 21. prevents food from entering the trachea
Down
- 2. oxygen-bound hemoglobin
- 3. all the gases found in air
- 6. molecule sent to the lungs for exhalation
- 7. O2 and CO2 diffuse from high pressure to low pressure
- 8. muscle for breathing
- 10. fluid-filled space that creates a pressure gradient
- 13. amount of air during a normal breath
- 15. contains C-shaped cartilage rings
- 16. oxygen-carrying molecule found in red blood cells
- 18. produces sound and made of cartilage and muscle