Question
The structure marked as “A” in the picture below is supplied by ?
A. Inferior mesenteric artery.
B. Ileocolic artery.
C. Middle colic artery.
D. All of the above.
Show Answer
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Correct Answer » D
Explanation
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Ans:D. All of the above.
The structure marked as “A” in the picture above represents the colon.
BLLOD SUPPLY OF LARGE INTESTINE.
The large intestine is supplied by branches of the superior mesenteric artery (SMA), as follows:
- Ileocolic artery through its cecal and appendicular branches
- Right colic artery, which has a descending (anastomoses with the cecal artery) and an ascending branch
- Middle colic artery, which has a right (anastomoses with the ascending branch of right colic artery) and a left branch and
The large intestine is supplied by the branches of the inferior mesenteric artery (IMA) as follows:
- Left colic artery, which has an ascending (anastomoses with the left branch of the middle colic artery) and a descending branch
- Multiple sigmoid arteries
- Superior rectal artery
The arc of Riolan (meandering mesenteric artery) is a communication between SMA and IMA.
Anorectum also receives blood supply from the internal iliac arteries as follows:
- Middle rectal artery
- Inferior rectal artery (a branch of internal pudendal artery)
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