Across
- 3. Primary organ of gas exchange
- 5. Flap that prevents food from entering the airway
- 8. Branches of the airway leading into each lung
- 9. Membrane that surrounds and protects the lungs
- 10. Contains the vocal cords; also called the voice box
Down
- 1. Smallest air passages before the alveoli
- 2. Tiny air sacs where oxygen and carbon dioxide are exchanged
- 4. Main muscle involved in breathing
- 6. Passageway for air from the nose to the larynx
- 7. Tube that carries air to the bronchi