Across
- 2. divides the nose into right and left portions
- 4. air-filled spaces in the skull
- 5. windpipe
- 7. cartilage sometimes called "Adam's apple"
- 9. lung with three lobes
- 11. protein to which oxygen binds
- 12. voicebox
- 14. combined with oxygen
- 15. lung with two lobes
Down
- 1. oily secretion that keeps alveoli open
- 3. most CO2 transport method in blood
- 6. throat
- 8. ion found in hemoglobin molecule
- 10. air sac; site of respiratory membrane
- 13. create turbulence to warm, moisten, & filter air