186 RESPIRATION 



4. Discuss the mechanics of breathing. 



5. State the aims of ventilation. 



6. How would you ventilate a room ? 



7. What causes discomfort in a poorly ventilated room ? 



8. In a diagram containing a cell, lymph space, and a capillary 

 indicate, by means of arrows, how respiration takes place. 



9. Build a box to illustrate a room with two windows. Manipu- 

 late the windows to illustrate proper ventilation. Candles may be 

 used to show the best methods of ventilation. 



SUPPLEMENTARY READINGS 



Howell, W. H., Textbook of Physiology (W. B. Saunders Co.). 

 Williams, S. F., Healthful Living (The Macmillan Co.). 



