Across
- 2. fresh air we breathe in
- 6. dioxide stale air we breathe out
- 7. the air branches into these smaller parts
- 8. clusters of grapes where an exchange occurs
Down
- 1. air enters the
- 3. covering over the windpipe
- 4. windpipe
- 5. the air is split into the the left and the right
- 9. air goes through the voice box