SUPERIOR MESENTERIC ARTERY. 411 



Those branches of the superior mesenteric arter}^ which supply the ascend- 



Fig. 285. 



Fig. 285. THE SUPERIOR MESENTERIC ARTERY, AND ITS BRANCHES 

 (from Tiederuauu). 



The transverse arch of the colon is turned upwards ; the transverse meso-colon is 

 dissected so as to expose the duodenum and pancreas at its root ; the small intestines are 

 thrown towards the left side; a, the descending part of the duodenum; b, the lower 

 part before it passes behind the superior mesenteric artery and root of the mesentery ; c, 

 the commencement of the jejunum to the left of the root of the mesentery ; c', </, the 

 jejunum and ileum ; d, the termination of the ileum in the caput csecum coli ; e, the 

 caecum ; /, the vermiform process ; g, the ascending colon ; h, the transverse arch ; i, the 

 descending colon ; k, the pancreas; 1, the trunk of the superior mesenteric artery; 1', 

 the termination of that vessel where it loops round into a branch of the ileo-colic ortery ; 

 2, 2, 2, 2, the intestinal branches ; 2', 2', 2', several of their loops in the mesentery ; 3, 

 small panereatico-duodenal branch passing to 3', to unite with the branch from the gastro- 

 duodenal ; 4, the middle colic branch ; 5, its left colic branch passing at 5' to unite with 

 the branch of the left colic of the inferior mesenteric ; 6, right branch ; 7, right colic and 

 ileo-colic arteries in one trunk ; 8, right colic, uniting by a loop with the middle colic ; 

 9, the ileo-colic, uniting with the end of the superior mesenteric artery. 



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