THE STOMACH 



485 



about to the middle of the stomach. The fundus gland region is readily distin- 

 guished by its thickness (ca. 3 mm.) and its brownish-red, mottled appearance.^ 

 The fourth or pyloric region is pale, thinner than the preceding, and presents a 

 number of irregular folds.^ At the pylorus a remarkable prominence (Torus pylo- 

 ricus) projects from the wall of the lesser curvature and diminishes considerably 

 the size of the orifice. It is about an inch and a half (ca. 3 to 4 cm.) long and 



Fig. 423. — Abdominal Viscera of Pig; Ventbal View. 

 The greater omentum has been removed. B, urinary bladder; (?. gall-bladder; X, xiphoid cartilage, 

 dicate course of coils of colon. The spleen was contracted. 



Arrows in- 



nearly half an inch (ca. 1 cm.) high. Sometimes it is a grooved ridge; in other 

 cases it has the form of a rounded eminence attached by a pedicle to the wall. It 

 consists largely of fat, but fibers from the circular muscular coat extend into it. 

 The arrangement of the muscular coat is shoAvn in Figs. 420, 421. 



1 It will be noted that the fundus gland region does not extend up to the lesser curvature; 

 here the cardiac gland region joins the pyloric. 



2 Microscopic examination shows that these regions are not sharply marked oflf from each 

 other; instead, there are intermediate zones in which glands of both the adjacent regions are 

 present, and also glands of intermediate histological character. 



