| Across |
| 2. |
pores of ___ that allow gases to move through the alveolar walls |
| 3. |
clusters of lymphatic tissue in the pharynx that are the first line of defense against infection |
| 8. |
a phospholipid that lines the alveoli and prevents them from collapsing |
| 11. |
the structure made up of hard and soft components that separates the oral and nasal cavities |
| 12. |
a flap of cartilaginous tissue that covers the opening to the trachea and diverts food and liquids to the esophagus |
| 13. |
the two passageways that branch off the trachea and lead to the left and right lungs |
| 15. |
another name for the voice box |
| 16. |
the collective name for the respiratory and cardiovascular systems |
| 17. |
air sacs in the lungs responsible for gas exchange |
|
|
| Down |
| 1. |
another name for the throat |
| 4. |
the air-filled cavities that surround the nose |
| 5. |
three uneven, scroll-like nasal bones in the nasal cavity |
| 6. |
concave area between the lungs that leaves room for the heart and other structures of the chest cavity |
| 7. |
two small openings in the nose, another name for nostrils |
| 9. |
the smallest air-conducting branches of the bronchi |
| 10. |
double-walled sac surrounding the lungs |
| 14. |
connects the larynx to the throat, another name for windpipe |
|
