IN HUMAN PHTSIOL OGT. I 8 1 



character of his food, the nature of his labor, and the 

 activity of the three eliminating organs the skin, the kid- 

 neys, and the lungs. One perspiring freely, or eating dry 

 food, needs more drink than one whose skin is inactive, 

 or whose food consists, in part, of soups or watery vege- 

 tables. 



35. Why, during a pestilence, are those who use liquors 

 as a beverage the first, and often the only victims ? 



The nervous system becomes impaired, the digestion 

 weakened, and the blood impoverished : hence, the func- 

 tions of the body being disturbed, its ability to resist 

 disease is greatly impaired. It is said that the alcohol 

 hardens the albuminous matter of the brain and the mem- 

 branous lining of the lungs, and hence clogs the action 

 of these organs. 



36. What two secretions seem to have the same general 

 use? 



The saliva and the pancreatic juice both change starch 

 into sugar. They have other important uses, however, in 

 the process of digestion. The former softens the food 

 and aids in the work of mastication, while the latter 



emulsifies the fats. 



37. How may the digestive organs be strengthened? 



The digestive organs, like the other organs, are strength- 

 ened by judicious labor. The stomach is a muscle, and 

 like muscle, generally grows strong by use and weak by 

 disuse. The same laws should govern one in his daily 

 exercise of every organ brain, hand, and stomach. 



