250 THE RESPIRATORY APPARATUS 



26. What is a bronchiole? Lobule? 



27. Where is the infundibulum in the lobules of the lungs? The 

 air sacs? 



28. Name the variety of epithelium lining the bronchi, bronchioles, 

 alveoli, and air sacs. 



29. What relation do the capillaries of the pulmonary artery and 

 vein bear to the air sacs of the lobules? 



30. What relation do the respiratory epithelium and capillaries 

 bear to respiration? 



31 Describe respiration. 



32. Give the normal rate of respiration per minute at birth. Five 

 years. Fifteen to twenty years. Twenty to twenty-five years. 

 Thirty to fifty years. 



33. Name the divisions of respiration. 



34. What do you understand by the terms tidal volume? comple- 

 mental volume? reserve volume? residual volume? in relation to 

 respiration? 



35. What is the average vital capacity of the lungs? What is 

 meant by it? 



36. Give the minimum and maximum daily volume of air breathed . 



37. What gaseous interchange takes place during each respiration 

 between the hemoglobin of the red cells and the air we breathe? 



38. How is the color of the blood affected by respiration? 



39. Where is the oxygen absorbed at each respiration carried to? 

 Where does the carbon dioxide in the blood come from to be given 

 off at each respiration? 



40. What centre in the medulla controls inspiration and expira- 

 tion? 



