Midgut is supplied by?
**Core Concept**
The midgut is a segment of the embryonic gut that develops into the distal half of the duodenum, the entire jejunum, and the ileum. The blood supply to this region is crucial for its development and function.
**Why the Correct Answer is Right**
The midgut is supplied by the superior mesenteric artery (SMA), which arises from the abdominal aorta. The SMA divides into the right colic artery, the ileocolic artery, and the superior mesenteric artery branches to the jejunum. This blood supply is essential for the development of the midgut, and its obstruction can lead to midgut volvulus, a condition characterized by the twisting of the intestine around the SMA. The SMA also supplies the right colon, which is why its obstruction can lead to ischemia of the right colon.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the celiac trunk primarily supplies the foregut, which includes the stomach, liver, pancreas, and the proximal duodenum.
**Option B:** This option is incorrect because the inferior mesenteric artery primarily supplies the hindgut, which includes the distal one-third of the rectum, the sigmoid colon, and the upper anal canal.
**Option C:** This option is incorrect because the hepatic artery supplies the liver and the proximal part of the duodenum, but not the midgut.
**Clinical Pearl / High-Yield Fact**
The superior mesenteric artery syndrome is a rare condition characterized by compression of the duodenum and jejunum by the SMA, leading to obstruction and ischemia.
**Correct Answer: C. Superior Mesenteric Artery**