Gross anatomy. The pancreas may have the shape of a dumbbell, tadpole, or sausage. It can be divided into four main parts: head: thickest part; lies to the right of the superior mesenteric vessels (superior mesenteric artery (SMA), superior mesenteric vein (SMV))uncinate process: extension of the head, posterior to SMV, SMA 1; attached to “C” loop of duodenum (D2 and D3)

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