Respiratory System Crossword
Across
- 4. These structures beat upward and help remove particulate matter from air passages.
- 6. Primary method of transporting oxygen in the blood.
- 7. Nostrils.
- 9. Movement of air into and out of the lungs.
- 11. Nerve that innervates the diaphragm.
- 12. A serous membrane that lines the thoracic cavity and surrounds the lungs.
- 15. Cartilage and bony divider that separates the nasal cavity.
- 17. Respiratory regions are found in the medulla oblongata and ___________.
- 18. Expelling air from the lungs; expiration.
- 19. Space between the vocal cords of the larynx.
- 20. Gas exchange between the air in the alveoli of the lungs and the bloodstream.
Down
- 1. Formed by the alveolar and capillary walls.
- 2. Most CO2 is converted into __________ ions for transport back to the lungs.
- 3. Passageway for air and food between the nose and larynx.
- 5. Air sacs in the lungs at the end of the bronchial tree.
- 8. Muscles of respiration that insert on the 1st and 2nd ribs.
- 10. Primary muscle of respiration.
- 13. Smallest air passageway of the bronchial tree.
- 14. Exchange of oxygen and carbon dioxide across the respiratory or cell membrane.
- 16. Type of receptors that sense changes in oxygen and carbon dioxide blood levels.