HISTOLOGY. 97 



layer of cells are found a few goblet cells. The glands 

 of the stomach are of two varieties; the peptic and 

 pyloric. The peptic are of the tubular variety, while 

 the pyloric are of the compound tubular variety, and 

 are located in the pyloric end of the stomach. Under 

 the microscope the type of glands will tell what end 

 of the stomach is under consideration. The peptic 

 glands secrete pepsin, and the gastric glands secrete 

 the acid of the stomach. 



The submucous coat consists of loose fibrous tissue, 

 lymphatics, blood vessels, nerves and occasionally a 

 little diffuse adenoid tissue is found. This layer is 

 thrown up into folds, forming the rugae and depres- 

 sions of the stomach. 



The muscular coat consists of three coats of mus- 

 cle tissue ; an inner circular, a middle longitudinal and 

 an outer oblique layer. 



The fibrous coat is made up of white fibrous tissue 

 derived from the peritoneum, and is covered on the 

 outside with endothelial cells. The outer coat of mus- 

 cle tissue is usually absent. The lymph-follicles are 

 not numerous in the stomach. 



SMALL INTESTINES. 



The small intestines consist of the usual four coats, 

 arranged in the usual manner. The folds in the in- 

 testines are called villi, and are composed of the same 



7 



