138 



ELEMENTS OF MAMMALIAN ANATOMY 



feet long in a largo cat, and is loss in diameter and much more 

 convoluted than the second portion, or large intestine. 



Tho small intestine consists of three parts: the duodenum, 

 the jcjmi HDL and the ileum. The duodenum is the first twelve 

 or tifteen centimeters. A duct from the liver and the gall- 

 bladder and two ducts from the pancreas, empty into it. The 



Fig. 67. — Transverse Section of the 

 Cat. 

 i. Sections of the intestine; d, duode- 

 num; a, aorta; pan, pancreas; pa, pan- 

 creas Aselli; spl, spleen; sp, spinous 

 process of the lumbar vertebra; tr, 

 transverse process; v, post-cava or in- 

 ferior vena cava; om, greater omentum; 

 the broken line is the peritoneum. 



Fig. 68. — Cross-section of the 

 Cardiac End of the Stomach. X3. 

 cav. Cavity of the stomach; ex, 

 external muscular coat; in, internal 

 muscular coat; m, mucous coat; 7nm, 

 muscularis mucosa?; 5, submucous 

 or areolar coat; se, serous or peri- 

 toneal coat. 



former is the common bile duct and the latter are the pancreatic 

 ducts. The jejunum is the portion of the small intestine next 

 to the duodenum. It is about twenty live centimeters long. 

 No special mark indicates its limits. It is so called because 

 that portion of the canal in man is frequently empty after 

 death. The ileum constitutes more than two-thirds of the small 

 intestine, is much convoluted, and extends from the jejunum 

 to the large intestine on the right side of the abdominal cavity, 

 near the iliac bone. The intestine is supported by the folds 

 of the peritoneum known as the mesenteries. 



