196 Physiology. 



use of alcoholic drink, considerable as I know that evil to 

 be." Thompson. 



" Bitters." - Many of the patent medicines sold under 

 the. name "bitters" contain alcohol, and may do great 

 injury both on account of the alcohol and of other power- 

 ful drugs of whose presence the user is unaware. No such 

 medicines should be used except under the advice of a 

 physician. 



Fat as a Tissue. As a tissue fat serves as a stored-up 

 food. A fat person can endure starvation longer, other 

 things being equal, than a thin person. A layer of fat 

 under the skin serves also as a heat saver. 



Hibernation. Hibernating animals are fat when they enter upon 

 their winter sleep, but are lean when they come out in the spring. 

 Remaining inactive, they have produced very little energy, their only 

 motions being a slow and feeble breathing and heart-beat. They have 

 consumed the fat, using it mainly in maintaining the necessary heat. 

 In short, they have burned their fat to keep them warm. 



Importance of Renewal of Blood and Lymph. The 



lymph surrounds the individual cells which make up the 

 tissues of the body. Every cell lives an independent life, 

 to a certain extent, taking its nourishment directly from 

 the lymph around it. The importance of an abundant 

 supply of good lymph is apparent. The supply and renewal 

 of the lymph depends on the blood. 



Effect of Digestion on Blood and Lymph. If digestion is 

 not good, or if there is not enough good food, good blood 

 cannot be made, and the lymph will not be good. The 

 cells are more or less starved, or poisoned if wastes are not 

 properly removed, and the general tone of the body will 

 soon be lowered; for the health of the body as a whole 

 depends on the average condition of the cells composing 



