CHAPTEE Yin. 



STOMACH-DIGESTIONGASTRIC JUICE. 



Physiological anatomy of the stomach Peritoneal coat Muscular coat Mucous 

 coat Glandular apparatus in the stomach Gastric tubules Mucous follicles 

 Closed follicles Gastric juice Mode of obtaining the gastric juice Gas- 

 tric fistula in the human subject Secretion of the gastric juice Secretion in 

 different parts of the stomach Quantity of gastric juice Composition of 

 the gastric juice Organic principles of the gastric juice Source of the acid- 

 ity of the gastric juice Ordinary saline constituents of the gastric juice. 



Physiological Anatomy of the Stomach. 



THE most dilated portion of the alimentary canal, in man, 

 is the stomach. It serves the double purpose of a receptacle 

 for the food and an organ in which certain important diges- 

 tive processes take place. It is situated in the upper part 

 of the abdominal cavity, and is held in place by folds of the 

 peritoneum and by the oesophagus. Its form is not easily 

 described. It has been compared to a bagpipe, which it 

 resembles somewhat, when moderately distended. As we 

 should naturally suppose, from the fact that the stomach 

 periodically receives considerable quantities of solids and 

 liquids, its form and position are subject to great variations. 

 When empty, it is flattened, and in many parts its opposite 

 walls are in contact. "When moderately distended, its length 

 is from thirteen to fifteen inches, its widest diameter about 

 five inches, and its capacity one hundred and seventy-five 

 cubic inches, or about five pints. 1 The parts usually noted 



1 BRINTON, Cyclopaedia of Anatomy and Physiology, London, 1859, Supple- 

 ment, p. 308. 



