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medullary ray

 

Definition: the center of the renal lobule, which has the shape of a small, steep pyramid, consisting of straight tubular parts; these may be either ascending or descending limbs of the nephronic loop or collecting tubules.

Synonym(s): Ferrein pyramid, pars radiata lobuli corticalis renis, processus ferreini

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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