Across
- 2. about 150 million in each lung
- 3. ion which is body's major buffer
- 5. throat
- 6. branched airway from trachea to alveoli
- 8. type of ion in hemoglobin molecule
- 10. cartilage called "Adam's apple"
- 12. divides nasal cavity into right and left portions
- 14. lung with two lobes
- 15. voicebox
- 16. respiratory _ is where gas exchange occurs
Down
- 1. keeps things from entering the glottis
- 4. bronchiole connected to individual alveolus
- 7. air-filled space in skull
- 9. lung with three lobes
- 11. protein to which oxygen binds
- 13. windpipe