The superior rectal artery is a direct continuation of which artery?
- A Middle rectal artery
- B Internal iliac artery
- C Inferior mesenteric artery ✓
- D Median sacral artery
Correct answer: C. Inferior mesenteric artery
Explanation
The superior rectal artery is the terminal continuation of the inferior mesenteric artery. It descends into the pelvis at the sacral promontory and supplies the rectum and upper anal canal. The middle rectal artery arises from the internal iliac artery. The median sacral artery is a small midline branch of the aorta.
Reference: Gray's Anatomy, 41st ed.
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