DIGESTION. 



243 



(b) Pyloric Glands. These glands (Fig. 179) have much longer ducts 

 than the peptic glands. Into each duct two or three tubes open by very 

 short and narrow necks, and the body of each tube is branched, wavy, 

 and convoluted. The lumen is very large. The ducts are lined with 

 columnar epithelium,, and the neck and body with shorter and more gran- 



FIG. 178. 



FIG. 179. 



FIG. 177. 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 col- 

 umnar epithelium becoming shorter as the cells are traced downward; n, neck of gland tubes, with 

 central and parietal or so-called peptic cells; 6, fundus with curved cspcal extremity the parietal cells 

 are not so numerous here. X 400. (Klein and Noble Smith.) 



FIG. 178. Transverse section through lower part of peptic glands of a cat. a, peptic cells; 6, 

 small spheroidal or cubical cells; c, transverse section of capillaries. (Frey.) 



FIG. 179. Section showing the pyloric glands. s, free surf ace; d, ducts of pyloric glands ; n, neck 

 of same; i, the gland alveoli; m m, muscularis mucosae. (Klein and Noble Smith.) 



ular cubical cells, which correspond with the central cells of the peptic 

 glands. During secretion the cells become, as in the case of the peptic 

 glands, larger and the granules restricted to the inner zone of the cell. 

 As they approach the duodenum the pyloric glands become larger, more 



