Across
- 1. the major air passages of the lungs which diverge from the windpipe
- 4. flexible connective tissue found in various forms in the larynx and respiratory tract
- 6. the voice box
- 9. the action of breathing
Down
- 2. a set of things working together as parts of a mechanism
- 3. any of the minute branches into which a bronchus divides
- 5. the air passage from the throat to the lungs
- 7. relating to, involving, or requiring free oxygen
- 8. another word for windpipe