508 



THE GASTRIC JUICE 



[CH. XXXIII. 



(b) Fundus glands are found throughout the remainder of the 

 cardiac half and fund us of the stomach. They are arranged in 



groups of four or five, which are 

 separated by a fine connective 

 tissue. Several tubules open into 

 one duct, which forms about a 

 third of the whole length of the 

 tube and opens on the surface. 

 The ducts are lined with columnar 

 epithelium. The ^land-tubules are 

 lined with coarsely granular poly- 

 hedral cells (central cells). Between 

 these cells and the basement mem- 

 brane of the tubes, are large oval 

 or spherical cells, opaque or gran- 



FIG. 355. Transverse section through 

 lower part of fundus glands of a cat. 

 a, Parietal cells ; 6, central cells ; 

 c, transverse section of capillaries. 

 (Frey.) 



ular in appearance, with clear 

 oval nuclei, bulging out the base- 

 ment membrane; these cells are 

 called parietal or oxyntic cells. 

 They do not form a continuous 

 layer. 



(c) Pyloric Glands. These 

 glands (fig. 356) have much longer 

 ducts than the fundus glands. 

 Into each duct two or three tubules 

 open by very short and narrow 

 necks, and the body of each tubule 

 is branched, wavy, and convoluted. 

 The lumen is large. The ducts are lined with columnar epithelium, 

 and the tubules with shorter and finely granular cubical cells, 

 which correspond with the central cells of the fundus glands. 

 The pyloric glands have no parietal cells. As they approach the 



FIG. 354. From a vertical section through the 

 mucous membrane of the cardiac end of 

 stomach. Two fundus glands are shown 

 with a duct common to both, a, Duct with 

 columnar epithelium becoming shorter as 

 the cells are traced downward ; n, neck of 

 gland tubes, with central and parietal cells ; 

 b, base with curved caecal extremity the 

 parietal cells are not so numerous here. 

 (Klein and Noble Smith.) 



