Across
- 2. where gas exchange happens
- 5. process of taking in oxygen and releasing carbon dioxide
- 6. the voice box
- 7. type of gas received during inhalation
- 8. muscle that buldges upward during exhalation
- 10. Tiny branches of the bronchi
- 11. The windpipe
Down
- 1. The tubes that branch off from the trachea
- 3. mechanical process of moving air in and out of the lungs
- 4. type of gas expelled during exhalation
- 9. A sticky substance that traps dust and particles