Lesson 9.1 Crossword
Across
3. | the two passageways that branch off the trachea and lead to the right and left lungs |
8. | the structure consisting of hard and soft components that separates the oral and nasal cavities; the roof of the mouth |
10. | the air-filled cavities that surround the nose |
11. | a flap of cartilaginous tissue that covers the opening to the trachea; diverts food and liquids to the esophagus during swallowing |
13. | the muscular passageway that extends from the nasal cavity to the mouth and connects to the esophagus; the throat |
14. | the thin-walled branches of the bronchi; the smallest air- conducting passageways of the bronchi. The terminal bronchioles conduct a small amount of gas exchange in the respiratory zone. |
15. | a triangular-shaped space inferior to the pharynx that is responsible for voice production; the voice box |
16. | the collective name for the respiratory and cardiovascular systems; these systems work together to conduct gas exchange |
Down
1. | three uneven, scroll-like nasal bones that extend down through the nasal cavity |
2. | air sacs in the lungs from which gas is exchanged with the capillaries |
3. | the thin, double-walled serous membrane that surrounds the lungs |
4. | the area of the thoracic cavity between the lungs; houses the heart, great blood vessels, trachea, esophagus, thoracic duct, thymus gland, and other structures |
5. | the two openings in the nose through which air enters; nostrils |
6. | small openings in the alveolar walls that allow gases and macrophages to travel between the alveoli |
7. | clusters of lymphatic tissue in the pharynx that function as the first line of defense against infection |
9. | a phospholipid that reduces the surface tension in the alveoli and prevents them from collapsing |
12. | the air tube that extends from the larynx into the thorax, where it splits into the right and left bronchi; the windpipe |