Inferior rectal artery

Last revised by Henry Knipe on 6 Nov 2023

The inferior rectal artery arises from the internal pudendal artery and supplies the lower anal canal including the external anal sphincter.


  • origin: from internal pudendal artery, just after it enters the pudendal canal

  • course: runs anteromedially through the ischioanal fossa to reach the deep portion of the external anal sphincter 

  • termination: divides into multiple branches to supply the muscles and integument of the lower anal region

  • anastomoses: with superior and middle rectal arteries and with contralateral inferior rectal artery branches

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure1: branches of the IPA (Gray's illustrations)
    Drag here to reorder.