DIGESTION OF FOOD. 303 
jgsophagus, and a redder pyloric area, in which the greater 
part of the digestive process goes on. 
Fic. 262._Stomach of dog (after Chauveau). 4, cesophagus ; B, pylorus. 
The mouth parts, even in some of the higher vertebrates, as 
the Carnivora, serve a prehensile rather than a digestive pur- 
pose. This is well seen in the dog, that bolts his food; but 
in this and allied groups of mammals gastric digestion is very 
active. 
Fic. 263.—General and lateral view of dog’s teeth (after Chauveau). 
