Across
- 4. A muscle that helps breathing.
- 7. Outer organ of the respiratory.
- 8. Contains the vocal cords.
- 9. Process by which energy is released from food.
Down
- 1. A set of bones that protects the lungs.
- 2. Prevents food from entering the windpipe.
- 3. Another name for the windpipe.
- 5. Another name for the throat.
- 6. The location where gaseous exchange takes place.