Medullary ray (anatomy)

In anatomy, a medullary ray (Ferrein's pyramid) is the middle part of a cortical lobule (or renal lobule). Each consists of a group of nephrons in the renal cortex.[1] Their name is potentially misleading, as "medullary" refers to their destination, not their location. They travel perpendicular to the capsule, and extend from the cortex to the medulla. They may be visualised during urography.[1]

Medullary ray
SystemUrinary system
Anatomical terminology

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  This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

  1. ^ a b Bigongiari, Lawrence R.; Patel, Suresh K.; Appelman, Henry; Thornbury, John R. (December 1975). "Medullary Rays: Visualization during Excretory Urography". American Journal of Roentgenology. 125 (4): 795–803. doi:10.2214/ajr.125.4.795. ISSN 0361-803X.

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