Comprehension: Superior and Inferior Mesenteric Arteries
Examine the angiogram of the superior mesenteric artery, giving attention to the point of origin from the aorta at L1. The inferior pancreaticoduodenal branch can also be seen but it is faint. The middle, right, and ileocolic arteries are well defined. Note the formation of arterial loops in the mesentery. The branches supplying the small bowel emerge from the loops as vasa rectae. Contrast material can be seen in the right ureter because of renal excretion from a preceding celiac artery injection.
Inferior Mesenteric Artery