THE GASTRIC GLANDS 



819 



deeply situated. They are directly continuous with Brunner's glands in the 

 duodenum (Watney). 



Blood-vessels and Lymphatics. The blood-vessels of the stomach first 

 break up in the submucous tissue and send branches upward between the 

 closely packed glandular tubes, which anastomose around them by a fine 

 capillary network with oblong meshes. Contiguous with this deeper plexus, 

 or prolonged upward from it, so to speak, is a more superficial network of 

 larger capillaries, which branch densely around the orifices of the tubes and 



FIG. 256. 



FIG. 257. 



FIG. 256. Longitudinal Section of Fundus of Gland from Dog's Stomach, a, Lumen oi 

 gland; b, intracellular canals in parietal cells; c, cut-off portion of parietal cell; d, chief cells; 

 e, intercellular canals leading from lumen of gland to canals in parietal cells. (Bailey.) 



FIG. 257. Tubule of Pyloric Gland of Man. (Highly magnified.) Note the thin basal layer 

 of cytoplasm; the reticular cell body containing secretion; the subdivision of the latter in some 

 cells into proximal and distal masses. 



form the framework on which are molded the small elevated ridges of mucous 

 membrane. From this superficial network the veins chiefly take their origin, 

 pass down between the tubes, with no very free connection with the deeper 

 intertubular capillary plexus, and open finally into the venous network in 

 the submucous tissue. 



The lymphatic vessels surround the gland tubes with a network. Toward 

 the fundus of the peptic glands are masses of lymphoid tissue which may 

 appear as distinct follicles, somewhat like the solitary glands of the small 

 intestine. 



