11 - blood supply of rectum

rectum is supplied mainly by three arteries they are :a- SUPERIOR RECTAL OR HEMORRHOIDAL ARTERY - which is a branch of the INFERIOR MESENTRIC which arises from the ANTERIOR SURFACE OF THE AORTA .b-MIDDLE RECTAL OR MIDDLE HEMORRHOIDAL ARTERY - which is a branch of the INFERIOR VESICAL ARTERY which is a branch of the INTERNAL ILIAC ARTERY .c- INFERIOR RECTAL OR INFERIOR HEMORRHOIDAL ARTERY - which