THE STOMACH. 



461 



each other by minute processes resembling papillae ; but the latter are only met 

 with in the vicinity of the pylorus. 



The gastric mucous membrane is composed of an epithelial layer and a corium, 

 in which are distinguished a glandular and a muscular laijer. The epitheUum is 

 stratified and tesselated in the left compartment, simple and calyciform in the 

 right sac, where it covers the little mucous processes that separate the glandulae, 

 and penetrates more or less deeply into the interior of these, becoming 

 spheroidal. 



In the left side, in the vicinity of the pylorus, there are found some 

 racemose glands analogous to those of the oesophagus ; but the real glandular 



Fig. 263. 



Fig. 264. 



PEPTIC GASTRIC GLAND. 



common trunk; 6, 6, its chief branches; 

 c, c, terminal caeca, with spheroidal gland- 

 cells. 



PORTIONS OF ONE OF THE C^CA MORE 

 HIGHLY MAGNIFIED, AS SEEN LONGITUDI- 

 NALLY (a), and in TRANSVERSE SECTION 

 (B). 



a, Basement membrane ; 6, large grandular 

 cell; c, small epithelial cells surrounding 

 the cavity. 



layer is only to the right side. There are foun^ multitudes of parallel tubular 

 glands, united by a small quantity of delicate connective tissue which is very 

 rich in nuclei. They secrete the gastric fluid, or furnish the mucus that covers 

 the surface of the epithelium ; they are consequently distinguished as pepsine 

 {or peptic) and mucous glands, the former being much more numerous than the 

 latter. 



They are composed of a simple straight tube at their origin (excretory duct), 

 which frequently divides into two or more flexuous tubes that terminate in 

 culs-de-sac (or glandular caca). The epithelium is not the same in the two 

 kinds of glands : the mucous glands (Fig. 265, a, h) are lined with cylinder- 



