222 



UNCONSCIOUS NERVOUS OPERATIONS 



it must lie in folds when the stomach is empty and 

 shrunken (Fig. 110). The blood supply of this mem- 

 brane is very large during digestion, and its appearance 

 is then much redder than at other times. The two open- 



Fig. 110. Stomach and duodenum. 



The anterior walls are cut away to show the folds of the mucous membrane s 

 rugne of stomach, and valvulae conniventes of intestine. 



ings of the stomach are both upon the upper side. That 

 near the left end, the cardiac orifice, admits the food from 

 the esophagus; that on the right, the pyloric orifice, con- 

 nects with the small intestine. The latter is surrounded 



