<prompt> Rotation of mid gut loop occurs around:Superior mesenteric arteryInferior mesenteric arteryMiddle-colic arterySuperior rectal artery  <response>: Ans. A Superior mesenteric arteryRef: Grays Anatomy 41st ed. P 1054Rotation of Midgut Loop Midgut loop has 2 ends: Cranial end and caudal end. The primary intestinal loop rotates around an axis formed by the superior mesenteric artery The rotation of midgut occurs when herniated intestinal loop returns back to the abdominal cavity. It begins at the end of third month of intrauterine life The primary intestinal loop rotates around an axis formed by the superior mesenteric artery, which divides the midgut loop into 2 segments: Proximal prearterial segment- present cranially Give rise to: Distal half of duodenum, Jejenum, Ileum except its terminal part Distal postarterial segment- present caudally Give rise to terminal part of ileum. Cecum, appendix, ascending colon, proximal 23rd of transverse colon.In order to return to abdominal cavity, the midgut loop undergoes anticlockwise rotation of 90deg thrice - total rotation of 270deg. The first 90deg rotation occurs outside abdominal cavity within umbilicus, remaining 2 rotations in abdominal cavityStepwise midgut rotation 