in Excretory Products and their Elimination (Urinary System) by

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Kidney has two distinct regions visible through frontal section: one is “Renal cortex” smooth textured area and deep and second is “Renal medulla” reddish-brown at inner part.

Renal medulla contains renal pyramids present in the cone shape.

The base of renal pyramid faces towards renal cortex and its apex which is also known as renal papilla faces towards renal hilum.