Medical terminology

5. smallest branches of the bronchi
7. thin hairs attached to the mucous membrane epithelium linging the respiratory tract
9. lower portion of the lung
11. the outer fold of pleura lying closest to the ribs and wall of the thoracic cavity
12. one of the air cavities in the bones near the nose
15. air sac in the lung
17. muscle separating the chest and abdomen. It's the most important muscle for breathing
20. lid-like piece of cartilage that covers the larynx, preventing food from entering the larynx and trachea during swallowing
22. breathing out

1. opening to the larynx
2. a gas produced by body cells when oxygen and food combines
3. space between the folds of the pleura
4. division of a lung
6. the inner fold of pleura lying closest to the lung tissue
8. branch of the trachea that is a passageway into the air spaces of the lung
10. region between the lungs and chest cavity
11. throat
13. uppermost portion of the lung
14. breathing in
16. collections of lymph tissue in the nasopharyx; also called pharyngeal tonsils
18. midline region where the bronchi, blood vessels, and nerves enter and exit the lungs
19. gas that passes into the bloodstream at the lungs and travels to all body cells
21. voice box
23. double folded membrane surrounding each lung