Renal medulla
Medulla renis
- Latin synonym: Medulla renalis
Definition
The renal medulla (medullary substance; substantia medullaris) consists of a series of red-colored striated conical masses, termed the renal pyramids, the bases of which are directed toward the circumference of the kidney, while their apices converge toward the renal sinus, where they form prominent papillæ projecting into the interior of the calyces.
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