i8o 



Physiology. 



management of the sympathetic nervous system. The 

 mouth may "water" for some attractive food, or become 

 dry through fear or anxiety. Hence we can see why a 

 restful, contented condition of mind and body will be 

 likely to favor the action of the many glands along the 

 digestive tube; and, on the other hand, why anxiety or 

 fretfulness are likely to hinder their action. 



Epithelium or Epidermis. 

 i 



Compound Glands 

 Fig. 77. Simple and Compound Glands. 



Effect of Alcohol on the Small Intestine. -- The effect 

 of alcohol on the small intestine is not so noticeable 

 as on the stomach, for two reasons. First, part of the 

 alcohol is absorbed in the stomach, and so does not reach 

 the intestine. Second, the alcohol that does pass on into 

 the intestine is diluted by the gastric juice. 



Nature's Efforts for Protection. Wherever alcohol 

 comes in contact with any of the tissues of the body it 



