USE OF MASTICATION. IOQ 



clearly fitted to break up our food into small pieces that 

 there can be no doubt as to what their use is. 



The chewing or mastication of food also causes a 

 greater flow of saliva. When we are not eating, the 

 salivary glands secrete little; but as soon as we com- 

 mence to chew, they begin to be more active. If food 

 be swallowed hastily, it is not mixed with sufficient 

 saliva, and in consequence, its starchy parts are imper- 

 fectly digested. 



