DIGESTION 



185 



The two kinds of gland employed in the production of gastric 

 juice are both found in the villous coat — the one in the fundus, 

 the other in the pyloric portion, though Ellenberger states that 

 he has found fundus glands in the pyloric region. They are 

 simple or divided tubes lying side by side, and opening, generally 

 in groups, on the surface of the mucous membrane by means of 

 a shallow depression in the coat. These depressions can readily 



I Duct. 



I Gland. 



Pyloric Gland. 



' Duct. 



Chief Cells. 



Parietal Cells. 

 > Gland. 



SCALE \WJ* 



Cardiac or Fundus Gland. 



Fig. 67. — The Gastric Glands after Heidenhain (Waller). 



be seen studded over the tunic of the fundus, giving it a rough 

 appearance owing to the elevation of the mucous membrane 

 between the openings of the glands ; in the pyloric region the 

 membrane is as smooth as that found in the intestine. Each 

 gland consists of a body, neck, and mouth, and is lined with 

 cells ; it is in respect of the cellular contents that the pyloric 

 and fundus glands differ. 

 The cells of the fundus gland (Fig. 67) are small, polyhedral, 



