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inferior rectal (hemorrhoidal) artery
Origin: internal pudendal artery
Distribution:
1) anal canal
2) muscles & skin of anal region
3) skin of buttocks
Anastomoses:
1) middle rectal artery
2) perineal artery
3) gluteal artery
4) superior rectal artery*
* 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.
General
blood vessel
Properties
FORM: inferior rectal (hemorrhoidal) artery
ORIGIN: internal pudendal artery
References
Stedman's Medical Dictionary 27th ed, Williams &
Wilkins, Baltimore, 1999
Components
intima; tunica intima
tunica media
vascular endothelium