DISSECTING MANUAL. 



it runs upward to the left from the upper and right part of the 

 head; peritoneum covers it partly in front. [1124] 



The body is prismatic and tapers to a rather pointed end 

 (tail) ; it has three surfaces and three borders. Surfaces; the 

 upper (or anterior) looks upward and forward, is covered by 

 lesser sac, and has a prominence (omental tuberosity) at its 

 right end; the inferior is covered by the descending layer of 

 the transverse mesocolon ; the posterior crosses, from right to 

 left, the aorta, superior mesenteric artery, left renal vessels, left 

 suprarenal body, and left kidney. Borders; the anterior gives 

 attachment to the transverse mesocolon; the upper and pos- 

 terior borders have no special interest. The anterior surface 

 is covered by peritoneum of the lesser sac, and the inferior by 

 that of the greater sac. [1126] 



The pancreatic duct (Wirsung) begins at the tail, runs trans- 

 versely through the axis of the body, and bends downward 

 through the head; thence it runs with the common bile duct 

 through the wall of the descending duodenum, to empty by a 

 common orifice in the bile papilla. The accessory pancreatic 

 duct drains the head and opens into the duodenum nearly an 

 inch above and in front of the preceding. [1127] 



THE PERITONEUM. 



The peritoneum is a serous sac lining (parietal peritoneum) 

 the walls of the abdomen and investing (visceral peritoneum) 

 the viscera. It is closed in the male, but communicates, in the 

 female, with the Fallopian tubes. The peritoneal sac is sub- 

 divided into a greater and a lesser sac ; the latter is practically 

 a diverticulum running behind the stomach and adjacent or- 

 gans, and communicating with the great sac at the foramen 

 of Winslow. The peritoneal folds between the viscera and 

 parietes are divided into omenta, between the stomach and 

 other viscera; mesenteries, between intestine and posterior 

 abdominal wall; and ligaments, between the abdominal wall 

 and viscera other than the digestive tube. [1048, 1097] 



[226] 



