11 Middle colic artery. A. colica media. It passes in the mesocolon to the transverse colon. A
11a Marginal colic artery [[of Drummond]]. A. marginalis coli. Anastomosis between the left colic artery and the sigmoid arteries. B
12 Inferior mesenteric artery. A. mesenterica inferior. Arising at the level of L3-4, it passes to the left to supply the descending colon, sig-moid colon and rectum. B
12 a Ascending [intermesenteric] artery. A. ascen-dens [A. intermesenterica]. Anastomosis between the left colic artery and the middle colic artery. A B
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