metanephric pyramid
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http://purl.obolibrary.org/obo/UBERON_0005111
Metanephric pyramids are the conical masses that constitute the renal medulla in a metanephros; they contain the loops of Henle and the medullary collecting ducts[GO]. [ http://amigo.geneontology.org/amigo/term/GO:0072211 ]