ANATOMY

Detailed explanation-1: -It is roughly bean-shaped with an indentation, called the hilum, on the medial side. 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-2: -Blood travels to each kidney through the renal artery. The artery enters the kidney at the hilus (pronounced: HY-luss), the indentation in middle of the kidney that gives it its bean shape.

Detailed explanation-3: -What are the renal artery branches? 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: -The indented or concave section is known as the hilum. This is where the renal artery, the renal vein and the ureter enter / exit the kidney. Each kidney is enclosed in a semi-transparent membrane called as the renal capsule.