One quarter of the total ~blood~ output from the |heart| comes to the |kidneys| along the renal |artery|. Two renal arteries arise from the abdominal section of the |aorta|, each |artery| supplies a lobe of the |kidney|. The incoming artery divides into four or five branches, eventually forming arterioles, each of which leads to the compact ball of |capillaries| called the |glomerulus|.
