836 



THE STOMACH. 



an inch, and their length from ^th to -g^th of an inch. At the cardiac end of 

 the stomach, where the membrane is thinnest, they are shorter and are simply 

 tubular ; but, in approaching the pyloric portion, they gradually become longer 



Fig. 584. THE GASTRIC GLANDS OP THE HUMAN STOMACH (magnified). 



a, the deep part of a pyloric gastric gland (from Kolliker) ; the cylindrical epithelium 

 is traceable to the csecal extremities. 



6, c, and d, cardiac gastric glands (from Allen Thomson). &, vertical section of a 

 small portion of the mucous membrane with the glands magnified 30 diameters ; c, deeper 

 part of one of the glands, magnified 65 diameters, showing a slight division of the tubes, 

 and a sacculated appearance produced by the large glandular cells within them ; the change 

 of the prismatic epithelium into spherical gland-cells within the tube is apparent ; d, 

 cellular elements of the cardiac glands, magnified 250 diameters. 



and assume a more complicated form, for, though quite straight near their 

 orifices, they are curved, clavate, or irregularly sacculated towards their 



Fig. 585. 



Fig. 585. PEPTIC GASTRIC GLANDS PROM THE DOG'S 

 STOMACH, MAGNIFIED (from Frey). 



1, longitudinal view ; a, the main duct ; b, one 

 of the first tubular divisions of the gland ; c, the 

 single tubes occupied by the gastric or peptic cells ; 

 d, some of the cells pressed out ; 2, cross section of 

 the main duct, showing the epithelial lining; 3, cross 

 section of the simple tubes. 



deep or closed extremity. Some are cleft, 

 first into two or three, and finally into six or 

 eight tubular branches. These characters 

 are most perfect near the pylorus. They 

 exist at all parts of the stomach, even where 

 the alveoli are indistinct or absent ; they 

 contain a colourless fluid, with granular 

 matter, and appear to be the secreting 

 organs of the gastric mucus and the gastric 

 juice. The tubuli, generally, are formed of 

 a simple homogeneous membrane ; fusiform 

 cells supposed to be muscular lie between 

 them on their contiguous or attached sur- 



