THE STOMACH. 



85 



and somewhat polyhedral. Next the wall .of the tube, large, granular, 

 bulging cells are scattered irregularly. The epithelium occupies the 

 major portion of the space in the tube, so that the lumen is very 

 small. 



A single bifid tube is represented in Fig. 63. The prominent dis- 

 tinguishing feature of the peptic or cardiac tubules is afforded by the 

 large border or parietal cells. The cells next the lumina are called 

 central or chief cells. 



The pyloric gland-tubes pursue a course not greatly unlike that of 

 the tubes just mentioned. They do not branch, however, until they 

 have penetrated well down toward the muscularis mucosae. Their 

 distinguishing character is afforded by the epithelial lining. At the 



FIG. 63. VERTICAL SECTION OP A PEPTIC TUBULAR GLAND, FROM CARDIAC MUCOSA OF STOMACH, 

 LARGELY DIAGRAMMATIC. 



A. Lumen of duct-portion of tubule. 



B. Neck of last. 



C. Gland portion. 



D. D. Central cells. 



E. E. Border cells. 



F. The glandular portion in T. S. 



G. Line of commencing muscularis mucosae. 



surface, the cells are columnar with polygonal transection. The 

 deeper parts are lined with translucent cylinders. The lumina are 

 larger than those of the peptic tubes. 



The gastric gland-tubes are placed thickly side by side, their bases 

 reaching the muscularis mucosae. Between and beneath the tubes is 

 a dense network of blood capillaries. 



