ANATOMY

Detailed explanation-1: -The renal sinus is a fat-filled cavity in the middle of the kidney that cushions important parts. One of those parts is the renal pelvis, which collects urine as it’s produced by the kidney. The most common disorder associated with the renal sinus is a cyst, which often has no symptoms.

Detailed explanation-2: -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-3: -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.

Detailed explanation-4: -Between the pyramids are major arteries termed the interlobar arteries. Each interlobar artery branches over the base of the pyramid.