268 



DIGESTION. 



Fig. 68.* 



The glands which are found in the human stomach may 

 be divided into two classes, the tubular and lenticular. 



Tubular Glands. The tubular 

 glands may be described as a col- 

 lection of cylinders with blind ex- 

 tremities, about -^ th of an inch in 

 length, and -j^ in diameter, packed 

 closely together, with their long axis 

 at right angles to the surface of the 

 mucous membrane on which they 



open, their blind ends resting on the submucous tissue. 

 Fig. 69. f (See fig. 69.) They 



are all composed of 

 basement mem- 

 brane, and lined by 

 epithelial cells, but 

 they are not all 

 of exactly similar 

 shape ; for while 

 some are simple 

 straight tubes, open 

 at one end and 

 closed at the other 

 (fig. 69), others 

 present at their 

 deeper extremities 

 Longitudinal a varicose, pouched, 



muscr. fibres. 



Peritoneum, or in some cases, 

 oven a branched appearance (fig. 70, b and c). The 



* Fig. 68. Small portion of the surface of the mucous membrane of 

 the stomach (from Ecker) r f. The specimen shows the shallow de- 

 pressions, in each of which the smaller dark spots indicate the orifices 

 of a variable number of the gastric tubular glands. 



f Fig. 69. Portion of human stomach (magnified 30 diameters, cut 

 vertically, both in a direction parallel to its long axis, and across it 

 (altered from Brinton). 



