Across
- 5. A major airway branching off the trachea into the lungs.
- 9. Tiny, hair-like structures that sweep debris out of the airways.
- 10. The central compartment of the thoracic cavity containing the heart.
- 11. The throat, serving as a pathway for both air and food.
- 12. A flap of cartilage that covers the windpipe during swallowing.
- 14. The voice box, located above the trachea.
Down
- 1. The act of breathing air into the lungs.
- 2. A tiny branch of air tubes within the lungs.
- 3. A substance in the alveoli that prevents them from collapsing.
- 4. The windpipe, supported by cartilaginous rings.
- 6. The act of breathing air out of the lungs.
- 7. The serous membrane folding back on itself to form a two-layered membranous pleural sac.
- 8. The primary dome-shaped muscle used in inhalation.
- 13. Tiny air sacs in the lungs where gas exchange occurs.
- 15. The anatomical term for nostrils.