22 



APPLIED PHYSIOLOGY 



Organs of the chest and abdomen. 



a lungs. d stomach. 



albumin is called peptone. The stomach has no effect 

 upon starch or fat. Only a small amount of the albumin 



is really changed to peptone by 

 the gastric juice, for every few 

 moments the opening leading 

 from the stomach permits a 

 small quantity of food to pass 

 out. So food does not remain 

 with the gastric juice long 

 enough to be fully digested. 

 The mixture of food and gastric 

 juice leaving the stomach is 

 called chyme. 



31. The intestine. When 

 food leaves the stomach it passes 

 into a coil of a thin muscular 

 tube called the intestine. The 

 intestine is about twenty-five 

 feet in length. Its upper four fifths is about an inch in 

 diameter, while the lowest one fifth is about twice this size. 

 Both parts slowly squeeze the food along, mixing it with 

 three fluids, which act upon the food and change it to a 

 liquid. 



32. Intestinal fluids. First. In the mucous membrane 

 of the intestine are small tubelike glands. They pour out 

 a liquid called the "{tetfina! j^'-Cf The intestinal juice is 

 small in quantity, and does not have much effect upon the 

 food. 



Second. Behind the stomach is a gland called the pan- 

 creas or sweetbread. Each day it pours Into the intestine 

 about a quart of a liquid called the pancreatic juice. This 

 juice does most of the work of digesting food. It acts 

 upon the albumin left by the stomach, and changes it to 



b heart. 



c diaphragm. 



e liver. 

 / intestine. 



