THE STOMACH 427 



is found between the ascending and transverse portions of the 

 duodenum. 



Pericecal folds and fossae are found in the region of the 

 ceeum. (1) The superior iliocolic fossa is found between the 

 iliocolic fold in front, the mesentery of the small intestine, 

 the ileum, and a small portion of the cecum behind. It is 

 a very narrow space. (2) The inferior ileocecal fossa (or ilio- 

 appendicular) is found behind the angle of junction of the 

 ileum and cecum. It is bounded by the ileocecal fold, or " blood- 

 less fold" of Treves, which is attached by its upper extremity 

 to the ileum, opposite its mesenteric attachment, while the 

 lower extremity, passing over the ileocecal junction, is attached 

 to the mesoappendix, and sometimes the appendix; it is thus 

 called the ileoappendicular fold. The ileocecal fossa is bounded 

 above by the posterior surface of the ileum and its mesentery; 

 in front and below by ileocecal fold, and behind by the upper 

 part of the mesoappendix. (3) The retrocecal fossa is found 

 behind the cecum; seen only on raising the cecum. It is the 

 space found between the superior cecal fold, on the right side, 

 one edge is attached to parities and extends from the lower 

 pole of the kidney to the iliac fossa and by the other to the 

 posteroexternal aspect of the colon and cecum, on the left 

 side by the inferior cecal fold, which is essentially the insertion 

 of the mesentery into the iliac fossa. 



The intersigmoid fossa is constant in the fetus and during 

 infancy, seldom seen in the adult. After raising the sigmoid 

 flexure of the colon it will be seen on the left surface of the 

 sigmoid mesocolon; a small recess lying on the external iliac 

 vessels, in the interspace between the psoas and iliacus muscles. 

 This is the orifice leading to the fossa intersigmoidea, which 

 lies behind the sigmoid mesocolon, and in front of the parietal 

 peritoneum. 



THE STOMACH (GASTER) 



Tiie stomach lies in the epigastrium, left hypochondrium, 

 and sometimes the mesogastrium. It is the most dilated por- 

 tion of the alimentary canal. Its shape is pyriform; the left 

 or larger portion is called the cardia, and below this is the 

 fundus; the right end is termed the pylorus. The right opening 

 of the stomach is called the pyloric orifice, and the left the 



