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| Q. |
With regard to the blood supply of the rectum and anus |
| A. | It is principally the inferior rectal artery |
| B. | The anal canal is a site of porto-systemic anastomosis |
| C. | The veins do not correspond to the arteries |
| D. | The inferior mesenteric artery changes to the superior rectal artery at L3 |
| E. | The vessels do not supply the full thickness of the anal wall |
| Answer» B. The anal canal is a site of porto-systemic anastomosis | |
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