SALIVARY GLANDS AND SALIVA. 



257 



and crushed, and by being at the same time mixed with 

 the fluids of the mouth, are reduced to a soft pulp, capable 



Fig. 66.* 



of being easily swallowed. The fluids with which the food 

 is mixed in the mouth consist of the secretion of the 



* Fig. 66. Diagram of the alimentary canal. The small intestine 

 of man is from about 3 to 4 times as long as the large intestine. 



