THE ABDOMEN 



733 



tremity is in contact with the spleen. The greater part of the organ 

 Hes in the epigastric region, but its left extremity is situated in 

 the left hypochondrium. The antero-superior surface is covered 

 by the ascending layer of the transverse meso-colon, and the inferior 

 surface by the descending layer, but the posterior surface is destitute 

 of serous covering. The length of the organ is from 6 to 8 inches, 

 its depth from i to i^ inches, except at the right and left extremities, 

 and its thickness from ^ to | inch. Its weight is about 3^ ounces. 



Hepatic Artery Gastric Arter>- 



Splenic Artery furnishing 

 the Vasa Brevia 



Pyloric Artery 



Right Gastroepiploic 

 Artery 



Vena Portae 



Common Bile-duct [N 

 stro-duodenal Artery | 



Superior , 

 Pancreatico- / 

 duodenal /~~~~ 

 Artery 



Gastro-epiploic 

 Artery 



Superior Mesenteric Vein 



Superior Mesenteric Artery 



I 



Inrerior Pancreatico-duodenal Artery 



Fig. 315. — The Arteries of the Stomach, Duodenum, Pancreas, 



AND Spleen. 



It has been likened in shape to the capital letter J laid thus C 

 (Birmingham). For convenience of description it is divided into a 

 head, neck, body, and tail. 



The head is the enlarged flattened right extremity. It chiefly 

 corresponds with, and is closely attached to, the second and third 

 parts of the duodenum as far almost as the duodeno- jejunal flexure. 

 The expansion of the head to the left along the upper part of the 

 third portion of the duodenum is called the uncinate process. 



Relations — Anterior. — The transverse colon with its meso-colon, 

 and the superior mesenteric vessels crossing the uncinate process. 



