MEDICAL PHYSIOLOGY

Detailed explanation-1: -The renal sinus is a central part of your kidney where things go in (like nerves and arteries) and come out (like pee, veins and lymphatic channels). Like the rest of your kidney, the renal sinus has fat padding around it.

Detailed explanation-2: -Each kidney has a single renal artery that originates from the aorta. As it enters the renal sinus, the renal artery divides into several interlobar arteries (Figure 2). These enter the kidney tissue at the cortico-medullary border and become the arcuate arteries.

Detailed explanation-3: -The right renal artery originates from the anterolateral aspect of the aorta and runs in an inferior course behind the inferior vena cava to reach the right kidney, while the left renal artery originates slightly higher and from a more lateral aspect of the aorta, and runs almost horizontally to the left kidney.

Detailed explanation-4: -The hilum leads to a large cavity, called the renal sinus, within the kidney. The ureter and renal vein leave the kidney, and the renal artery enters the kidney at the hilum. The outer, reddish region, next to the capsule, is the renal cortex.