256 



HISTOLOGY 



The pyloric glands are found near the pylorus, but the area which they 

 occupy is not sharply set off; they pass over into gastric glands through 

 a "transition zone." Pyloric glands have very deep pits, from which 

 short, winding, branched tubules grow out. Their form in the adult is 

 shown in Fig. 248. The cells in the pits are mucous cells, and those in 



Gastric pits. 



Simple epithelium 

 cut 9bliquely, so 

 that it appears to 

 be stratified. 



B|& -Tunica propria. 



Pyloric gland. 



Sections of pyloric 

 glands. 



Solitary nodule. 



Muscularis 



mucosae. 



FIG. 248. VERTICAL SECTION OF HUMAN PYLORIC GLANDS. X 90. 



the tubules are also regarded as mucous cells. The latter are columnar, 

 with rounded nuclei in their basal part, and protoplasm which may closely 

 resemble that of the chief cells. Parietal cells are occasionally found, and 

 such cells have been reported in the duodenal glands and in the superficial 

 glands of the oesophagus. Slender dark cells, apparently due to com- 



