STOMACH. 



2OI 



become small; granules disappear. They do not respond to mucin stains. 

 It is supposed that the granules, called zymogen granules, become converted 

 into pepsin. The chief cells form the greater part of the gastric glands, 



Gastric pits. 



Simple epithelium 



cut obliquely, so 

 that it appears to 

 be stratified. 



Tunica propria. 



Pyloric gland. 



Sections of pyloric 

 glands. 



Solitary nodule. 



" -=s 



Muscularis 

 mucosae. 



FIG. 226. VERTICAL SECTION OP HUMAN PYLORIC GLANDS. X 90. 



parietal, cells being irregularly distributed among them as in Fig. 223. The 

 latter are fewest toward the base of the gland. Like the cells of serous 

 crescents, they appear crowded away from the lumen with which they are 

 often 'Connected only by intercellular secretory capillaries (Fig. 224). The 



