Across
- 2. Another name for the voice box.
- 6. Movement of air in and out of the lungs.
Down
- 1. The process of breathing in air into the lungs.
- 3. Air sacks in the lungs.
- 4. Prevents food from entering the trachea.
- 5. The muscle below the ribs and lungs.
- 7. Another name for the windpipe.