STOMACH 



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The Stomach is a pyriform sac with two openings the oeso- 

 phageal or cardiac, opening, and the pylorus, opening into the 

 duodenum. The stomach has two ends, two surfaces, two 

 curvatures, and two openings. 



The large cardiac end is directed backwards and to the left 

 and the narrow pyloric end is directed to the right. The 

 stomach lies in the left hypochondrium and left half of the 

 epigastrium, under the left cupola of the diaphragm. In 

 extreme extension it may reach down below the subcostal plane. 



Cardiac end 



(Esophagus 



Pyloric end 

 Duodenum 



Great Curvature 



THE STOMACH. 



The length of the stomach is 10 to 11 inches and its greatest 

 diameter 4 to 4| inches ; its capacity as a rule does not exceed 

 40 ounces (1 quart). 



The stomach is composed of three layers of muscles with their 

 fibres running in different directions, which insures thorough 

 contractions of all parts taking place during digestion. When 

 empty, the stomach in the healthy state is not collapsed, but 

 contracted. 



The stomach lies in a cavity surrounded by other organs, 

 and to this cavity is often given the name of the stomach 

 chamber. 



