RID213 medulla of kidney

synonym Mark der Niere medullary pyramids pyramides renales pyramids pyramids of kidney renal medulla renal pyramids renal pyramids set set of renal pyramids

definition The internal portion of the kidney, consisting of striated conical masses, the renal pyramids, whose bases are adjacent to the cortex and whose apices form prominent papillae projecting into the lumen of the minor calyces. [MeSH]