MEDICAL PHYSIOLOGY

Detailed explanation-1: -The outer, reddish region, next to the capsule, is the renal cortex. This surrounds a darker reddish-brown region called the renal medulla. The renal medulla consists of a series of renal pyramids, which appear striated because they contain straight tubular structures and blood vessels.

Detailed explanation-2: -The kidney is made up of solid tissue called parenchyma which consists of cortex and the medulla. The renal cortex is the outside section of the kidney, while the medulla is the inside section. The renal cortex has a more grainy texture, while the medulla is smoother.