Respiratory System Crossword

Edit Answers
1234567891011121314151617181920
Across
  1. 4. These structures beat upward and help remove particulate matter from air passages.
  2. 6. Primary method of transporting oxygen in the blood.
  3. 7. Nostrils.
  4. 9. Movement of air into and out of the lungs.
  5. 11. Nerve that innervates the diaphragm.
  6. 12. A serous membrane that lines the thoracic cavity and surrounds the lungs.
  7. 15. Cartilage and bony divider that separates the nasal cavity.
  8. 17. Respiratory regions are found in the medulla oblongata and ___________.
  9. 18. Expelling air from the lungs; expiration.
  10. 19. Space between the vocal cords of the larynx.
  11. 20. Gas exchange between the air in the alveoli of the lungs and the bloodstream.
Down
  1. 1. Formed by the alveolar and capillary walls.
  2. 2. Most CO2 is converted into __________ ions for transport back to the lungs.
  3. 3. Passageway for air and food between the nose and larynx.
  4. 5. Air sacs in the lungs at the end of the bronchial tree.
  5. 8. Muscles of respiration that insert on the 1st and 2nd ribs.
  6. 10. Primary muscle of respiration.
  7. 13. Smallest air passageway of the bronchial tree.
  8. 14. Exchange of oxygen and carbon dioxide across the respiratory or cell membrane.
  9. 16. Type of receptors that sense changes in oxygen and carbon dioxide blood levels.