Definition: An important part of the inner kidney. It consists primarily of collecting tubules as well as loops of Henle. The base of the medullary pyramid is next to the cortex and it tapers to form the renal papillae. There are between 8 to 18 medulla pyramids in each kidney.
Medullary Pyramid
From About.com
Updated: April 3, 2007
About.com Health's Disease and Condition content is reviewed by Kate Grossman, MD
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