Across
- 2. Membrane surrounding the lungs
- 6. Windpipe; tube that carries air to the bronchi
- 8. Process of breathing in
- 9. Upper part of the throat behind the nose
- 10. Branches from the trachea into each lung
- 11. Gas needed by the body for cellular respiration
- 13. Space between the two pleura layers
- 14. Air sacs of the lungs
- 16. Process of breathing out
Down
- 1. Moistens and filters incoming air
- 3. Muscle responsible for breathing
- 4. Hair-like structures that move mucus
- 5. Smallest branches of bronchi
- 7. Organ where gas exchange occurs
- 12. Flap that prevents food from entering the airway
- 15. Voice box