Dissection of jejunum, ileum and colon

Arteries, veins and nerves of colon, general view

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Image #143-5

Dissection of jejunum, ileum and colon Arteries, veins and nerves of colon, general view The colon has been elevated to form its usual position to demonstrate the distribution of blood vessels and nerves to its ascending, transverse and descending parts. The jejunum and ileum have been pulled downward. 1 . Primary and secondary arterial arches 2 . Pancreaticoduodenal vein (note that this vein receives branches which accompany the right branch of the middle colic artery, which in this specimen replaces the right colic artery) 3 . Head of pancreas 4 . Upper pointer: Ileal artery Lower pointer: Superior mesenteric plexus 5 . Horizontal part of duodenum (covered by connective tissue) 6 . Marginal artery (of Drummond) forming communication between middle colic and ileocolic arteries (right colic artery absent) 7 . Ascending colon 8 . Superior mesenteric lymph nodes 9 . Ileum 10 . Transverse colon (elevated) 11 . Superior mesenteric plexus 12 . Middle colic artery 13 . Middle colic artery (left branch forming marginal artery) 14 . Straight arteries 15 . Filament of inferior mesenteric plexus 16 . Duodenojejunal flexure 17 . Marginal artery 18 . Upper pointer: Middle colic vein Lower pointer: Superior mesenteric vein 19 . Jejunal arteries 20 . Jejunal vein 21 . Descending colon 22 . Jejunum 23 . Inferior mesenteric plexus