SUGGESTIONS FOR LABORATORY WORK 623 



larger or cardiac end is next to the diaphragm. The pyloric or 

 smaller end is curved sharply upon itself. It is firm to the touch 

 and appears as an annular constriction. 



Small Intestine. Very carefully turn the ornentum over toward 

 the thorax. The greatly coiled cylindrical small intestine will be 

 exposed. It is divided into three regions, the duodenum, the 

 jejunum, and the ileum. 



Duodenum. This is the first portion of the small intestine along 

 which the pancreas extends. It is held rather firmly in position. 

 Into the duodenum empty the common bile duct and the pan- 

 creatic duct. 



Jejunum. This is an ill-defined portion of the small intestine 

 immediately following the duodenum. It is so called because in 

 man it is often found empty after death. 



The Ileum. This is the last part of the small intestine. It ter- 

 minates in the large intestine, entering it obliquely. At its ter- 

 mination is the ileo-coecal valve which allows the alimentary con- 

 tents to pass from the small to the large intestine, but not easily 

 in the opposite direction. 



Large Intestine. Turn the coil of small intestine toward the 

 left leg. The large intestine extends from the caecum to the anus. 

 It is divided into five parts, ccecum, ascending, transverse and 

 descending colon, and rectum. 



Ccecum. This is a somewhat conical blind sac at the beginning 

 of the large intestine. It lies on the right side and in about the 

 middle of the abdominal cavity. 



Ascending Colon. This is the part of the large intestine which 

 extends upward from the caecum. 



Transverse Colon. This is a continuation of the preceding. It 

 extends transversely across the abdomen in front of the duodenum 

 and below the stomach. 



Descending Colon and Rectum. After extending nearly across 

 the abdomen from right to left, the large intestine passes obliquely 

 downward. The last and straighter part is called the rectum. 



Pancreas. The pancreas will appear as a pinkish, finely lobulated 

 and elongated body after the great omentum has been turned 

 toward the thorax. It extends from the spleen under the stomach 

 to the pylorus, in the great omentum, and then downward for a 

 short distance along the duodenum in the mesentery. 



