Respiratory Anatomy

5. The right lung has three of these sections, while the left has two.
7. The thin, double-layered serous membrane that encloses the lungs.
8. Tiny air sacs where the actual exchange of O2 and CO2 occurs.
9. This cavity warms, moistens, and filters air as it enters the body.
11. The leaf-shaped flap of cartilage that prevents food from entering the airway.
14. The muscular tube acting as a shared passageway for both air and food.

1. Smaller, tree-like branches that lead from the bronchi to the alveoli.
2. The two main branches that split from the trachea into each lung.
3. Microscopic blood vessels that wrap around air sacs for gas exchange.
4. The "windpipe" that connects the larynx to the bronchi.
6. A fluid that reduces surface tension to prevent the lungs from collapsing.
10. Tiny hair-like projections that sweep mucus and debris out of the airways.
12. Also known as the voice box; it contains the vocal cords.
13. The primary muscle of respiration that flattens during inhalation.