MICROANATOMY

Detailed explanation-1: -The hilum is the concave part of the bean-shape where blood vessels and nerves enter and exit the kidney; it is also the point of exit for the ureters-the urine-bearing tubes that exit the kidney and empty into the urinary bladder.

Detailed explanation-2: -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.

Detailed explanation-3: -The medial concave border of a kidney contains a notch known as hilus through which the renal artery enters and the renal vein and ureter leave the kidney.