A projecting ridge or fin on the bottom of the hull of a boat or ship that improves directional control and is often weighted for added stability. 2. The principal structural member of an aircraft, resembling a ship's keel in shape and function.
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.
Hematuria â Another effect of kidney scarring is the presence of blood in the urine, also called hematuria. Similar to the effect of protein, as the walls of the blood vessels in the kidneys harden, red blood cells can leak into the urine. This blood in the urine may cause urine to appear pink or light brown in color.