Blood supply of midgut by superior mesenteric artery
In this specimen we can see the superior mesenteric artery and its branches such as right colic, middle colic and ileocolic. The right colic artery further divides into ascending and descending branches, while the middle colic divides into right and left branches. The ileocolic artery divides into ascending and descending branches. These branches anastomose with each other. The left branch of the middle colic further anastomoses with the ascending branch of left colic artery which in turn is a branch of inferior mesenteric artery. The descending branch of ileocolic artery anastomoses with the superior mesenteric artery itself. The other branches of ileocolic artery are caecal branches, appendicular artery, and ileal arteries. The superior mesenteric artery also provides 15-20 jejunal and ileal branches.
Superior mesenteric artery:
The superior mesenteric artery is an unpaired ventral branch of the abdominal aorta. It arises about 0.5 cm below the celiac trunk (artery of the foregut) at the level of the intervertebral disc between the L1 and L2 vertebra. It supplies the derivatives of the mid gut.
Inferior mesenteric artery:
The inferior mesenteric artery is an unpaired ventral branch of the abdominal aorta that arises at the level of the L3 vertebra. The artery continues into the true pelvis as superior rectal artery. It supplies the derivatives of the hind gut.