<prompt> Initially renal aeries are branches ofAoaCommon iliac aeryExternal iliac aeryInternal pudendal aery  <response>: Initially the renal aeries are branches of the common iliac aeries, then the distal end of aoa and when kidneys are located at a higher level, they receive new branches from the aoa. Normally the caudal renal vessels undergo involution and disappear. Ref - pubmed.com 