Across
- 5. Voice box containing the vocal cords.
- 6. Membrane surrounding the lungs.
- 7. Tiny air sacs in the lungs where gas exchange occurs.
- 8. Flap that covers the trachea during swallowing.
- 9. Relating to the nose.
- 11. Main passageways that direct air into the lungs.
Down
- 1. Muscle that contracts to allow inhalation.
- 2. Act of breathing in.
- 3. The mechanical process of breathing
- 4. Windpipe that connects the larynx to the bronchi.
- 6. Throat; passageway for air and food.
- 10. Organs responsible for gas exchange in the respiratory system.