Medullary ray (anatomy)
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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. 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.
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Medullary rays
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Medullary rays
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ^ a b Bigongiari LR, Patel SK, Appelman H, Thornbury JR (December 1975). "Medullary rays. Visualization during excretory urography". The American Journal of Roentgenology, Radium Therapy, and Nuclear Medicine. 125 (4): 795–803. doi:10.2214/ajr.125.4.795. PMID 1211509.
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