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.
It is the outer reagion of a kidney nad is colloured light red. Renal Corte â¦ x accomodates the Glomerular capsule, largest part of nephrone, arterioles, veins and capillaries. Most filtration processes occur in this part of Kidney.