Respiratory System

2. / each of a pair of serous membranes lining the thorax and enveloping the lungs
3. / It affects voice modulation through expansion or contraction
6. / the main muscle of respiration
8. cartilage / the ring-shaped cartilage of the larynx
13. / any of the minute branches into which a bronchus divides.
15. / A fluid secreted by the cells of the alveoli
17. / the drawing in of breath; inhalation.
19. / a flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.
20. / the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus.
21. / attached to the larynx and the esophagus
22. / the hollow muscular organ forming an air passage to the lungs and holding the vocal cords in humans and other mammals; the voice box.

1. / any of the many tiny air sacs of the lungs which allow for rapid gaseous exchange.
4. / are shell-shaped networks of bones, vessels, and tissue within the nasal passageways
5. pleura / thin serous membrane tissue layer that sticks to the lung surface.
7. cords / makes your voice
8. / is a connective tissue found in many areas of the body
9. / a large cartilage of the larynx, a projection of which forms the Adam's apple in humans.
10. / exhalation of breath.
11. / inflammation of the mucous membrane in the bronchial tubes.
12. / the action of breathing.
14. volume / The volume of air remaining in the lungs after a maximal expiratory effort.
16. / connected to the oral cavity
18. / attached to the nasal cavity