THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The renal sinus is a cavity within the kidney which is occupied by the renal pelvis, renal calyces, blood vessels, nerves and fat. The renal hilum extends into a large cavity within the kidney occupied by the renal vessels, minor renal calyces, major renal calyces, renal pelvis and some adipose tissue.

Detailed explanation-2: -The renal sinus is a compartment inside your kidney that uses fat to cushion important parts like the renal pelvis, lymphatic channels, calyces and renal artery. The most common disorder associated with the renal sinus is a renal sinus cyst, which is usually asymptomatic and harmless.

Detailed explanation-3: -Each renal artery enters a kidney at a site called the renal hilum. This area is the entry and exit point for vessels and nerves that feed into the kidneys. From there, the artery branches into smaller blood vessels throughout the kidney.

Detailed explanation-4: -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.