MEDICAL PHYSIOLOGY

Detailed explanation-1: -The single renal artery enters the hilum and then branches to form the interlobar arteries, so-named because they pass between the lobes of the kidney. At the junction of the cortex and medulla, the interlobar arteries bend over to form incomplete arches.

Detailed explanation-2: -Each renal artery branches into segmental arteries, dividing further into interlobar arteries, which penetrate the renal capsule and extend through the renal columns between the renal pyramids. The interlobar arteries then supply blood to the arcuate arteries that run through the boundary of the cortex and the medulla.

Detailed explanation-3: -The renal arteries divide before entering the renal hilum into anterior and posterior divisions, which receive approximately 75% and 25% of the blood, respectively.