middle rectal (hemorrhoidal) artery

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Origin

internal iliac artery

Anastomoses

* The superior rectal artery is a tributary of the portal vein.

The middle & inferior rectal arteries drain into the inferior vena caval system. The anastomoses between the superior & middle or inferior rectal arteries form a portocaval anastomosis.

Distribution

middle part of rectum

More general terms

References

  1. Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999