2. The olfactory receptors are housed in the _________________________________________________. 3. The vocal cords are located in the _______________________________________________________. 4. Insects use ______________________________________________ to exchange gases. 5. The opposite movement of water and blood in gills is known as ________________________________. 6. The __________________________________________________is an air conduit only. 7. The paranasal sinuses and nasolacrimal ducts drain into the __________________________________. 8. Internally, the nose is divided by the nasal _________________________________________________. 9. The exchange of gases occurs in the ____________________________________________________. 10. The “blood” in insects is ___________________________________________________. 11. The _________________________________________ prevents food/liquids from entering the trachea. 12. Smoking kills about _______________________________________ per year in the U.S. 13. ___________________________ is carried in the blood bound to the hemoglobin of red blood cells. 14. There are _________________________ primary bronchi. 15. The lining of the _________________________________ is ciliated. 16. Air enters the lungs when they are under _______________________________ pressure. 17. What attracts the oxygen so that it moves from the mother to the fetus? ________________________ 18. The smallest bronchioles that lead into the respiratory zone are called __________________ bronchioles. 19. The trachea is held open by ________________________________________________________. 20. ____________________is caused by excessive mucus production in the lower respiratory passageways 21. ______________________________________________________ is caused by a bacteria. 22. _______________________________ occurs when the body doesn’t get enough oxygen to its tissues. 23. Constricting bronchioles can cause _____________________________________. 24. _________________________________ is the accumulation of too much carbon dioxide. 25. _________________________________ is the permanent enlargement and destruction of alveoli. 26. The average breath is about _________________________________________________________. 27. Breathing rate is controlled by the ______________________________________________________. 28. _________________________causes the brain to stop breathing because of low carbon dioxide levels. 29. Breathing rate is indirectly controlled by __________________________________________. 30. Earthworms breath via ______________________________________________. 31. Moving air in and out of the lungs is known as ___________________________________. 32. A tracheole would probably be found in a _______________________________. 33. Hemoglobin converts carbon dioxide into ______________________________________. |