Across
- 7. organ that collects air
- 8. inflating and deflating the lungs
- 10. connect the bronchus to the alveoli
- 11. tiny blood vessels have thin walls
- 12. exchange oxygen and carbon dioxide
Down
- 1. member of the chalcogen
- 2. in the movement in and out of the cells
- 3. acidic colorless gas
- 4. sends air to the lungs
- 5. muscles in order to aid in breathing
- 6. splits the air into each lung
- 9. where you smell and breath air from