1 1 6 ELEMENTS OF PH YSIOL OGY 



Control of flow. The are abundantly supplied with 



. The have none. 



Location. The arteries as a general rule are located 

 -. The veins are generally located . This adds 



to the of the body. 



Definitions. The arteries are tubes that carry blood 

 (both pure and impure) to the . 



The veins are tubes that carry blood (both pure and 

 impure) from the . 



Accidents. If an artery is cut, the pressure is to be 



applied - the cut and the . If a vein is cut, the 



pressure is to be applied - the cut. A cut vein may be 

 told from a cut artery in the three following ways : 



204. Activity is the most necessary condition for the health 

 of a cell. In every cell is found matter in three conditions : 

 that which is actually living, that which was recently living, 

 and that which is about to live by being transformed in the cell. 

 The transformation from lifeless to living, and from living to 

 dead, and the removal of dead matter must go on promptly. 

 Anything which interferes with this activity interferes with 

 the health of the cells. When life is natural and complete, 

 all the organs are given work to do and are healthy, active, 

 and strong; there is a feeling of buoyant happiness, the 

 mind is clear, the will is firm, and the man truly lives. 



APPLIED PHYSIOLOGY 

 EXERCISE I 



1. The main arteries run down the middle of each limb close to the 

 bone on the side toward which the limb bends. Why do they have 

 this position? 



2. Where is the thickest wall of the heart? (See Fig. 85.) Why? 

 The thinnest walls? Why? 



3. Why do we need warmer covering when asleep than awake? 



4. When would it be pleasant to throw off a coat or cloak, but 

 imprudent to do so? 



