84 THE PHYSIOLOGY OF DIGESTION AND ABSORPTION 



hand limit of the oblique fibers, the stomach is said during diges- 

 tion to be considerably constricted, so that a temporary sphincter 

 is established. This point is the point of separation between 

 the fundus and the antrum pylori, and is sometimes called the 

 sphincter antri pylorici. The fibers of the muscular coat are of 

 the plain variety, as is all the gastro-intestinal muscular tissue 



Serosa. 



FIG. 36. V. S. Wall of human stomach. 

 E, epithelium; G, glands; Mm, muscularis mucosae. X 15. (Stirling.) 



from the lower end of the esophagus to the external sphincter. 



3. The submucous coat consists of loose fibre-elastic con- 

 nective tissue which allows free movement between the muscular 

 and mucous coats. It contains rather large blood-vessels and 

 a nerve-plexus, the plexus of Meissner. 



4. The mucous coat has an average thickness of about ^ 



