318 



FOOD AND DIGESTION 



epithelium. The body of the gland is composed of granular secreting cells 

 called chief cells or peptic cells. Between these cells and the membrana pro- 

 pria of the tubes are large oval or spherical cells, granular in appearance with 

 clear oval nuclei; these cells are call oxyntic or parietal cells. They do not 

 form a continuous layer, figure 254. Intercellular tubules extending from 

 the duct of the gland between the chief cells and connecting with intracellular 



secretory tubules in the parietal cells 

 have been shown by the Golgi method, 

 figure 256. 



As the pylorus is approached the 

 gland ducts become longer and the 

 tube proper becomes shorter, and oc- 

 casionally branched at the fundus. 



The Pyloric Glands. These glands 

 have much longer ducts and larger 

 mouths than the peptic glands. 



FIG. 254. 



FIG. 255. 



FIG. 254. From a Vertical Section through the Mucous Membrane of the Cardiac End of 

 Stomach. Two peptic glands are shown with a duct common to both, one gland only in part, a, 

 Duct with columnar epithelium becoming shorter as the cells are traced downward; , neck of 

 gland tubes, with central and parietal or so-called peptic cells; h, fundus with curved cecal extrem- 

 ity the parietal cells are not so numerous here. X 400. (Klein and Noble Smith.) 



FIG. 255. Cross- sections at Various Levels of Peptic Glands of Stomach. X 400. M, 

 Section through gastric pit near surface; M'. section through gastric pit near bottom; h, mouth 

 of gland; k, neck; g, body near fundus; the chief cells are shaded lightly; b, parietal cells. 

 (Kolliker.) 



The parietal cells are absent in the pyloric glands. The pyloric glands be- 

 come larger as they approach the duodenum, also more convoluted and more 



