Question

what is medulla and cortex

Answer 1

the inner region of an organ or tissue, especially when it is distinct from the outer region or cortex (as in a kidney, an adrenal gland, or hair).

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Answer 2

cortex is the outer part of the kidney whereas renal medulla is the inner deeper part of kidney. They do also differ in the presence of nephron's.Cortical nephron's are present in cortex and medullary nephrons are present mostly in medulla with a small part present in inner cortex.
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