Across
- 2. Gas exchange. Increase surface area
- 5. Cartilage flap that alternately covers the trachea or esophagus
- 7. Air travels here after it enters through the nose or mouth
Down
- 1. Lungs
- 3. Muscle beneath the lungs that helps with breathing
- 4. Voice Box
- 6. Windpipe
- 8. Air enters