Medullary ray (anatomy)

In anatomy, the medullary ray (Ferrein's pyramid) is the middle part of the cortical lobule or renal lobule, consisting of a group of straight tubes connected to the collecting ducts.

Medullary ray
Details
SystemUrinary system
Identifiers
TAA08.1.01.018
FMA74299
Anatomical terminology

Their name is potentially misleading — the "medullary" refers to their destination, not their location. They travel perpendicular to the capsule and extend from the cortex to the medulla.

Additional Images

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References

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

    • Histology image: 16003loa – Histology Learning System at Boston University — "Urinary System: kidney, H&E, cortex and medullary ray"
    • Histology image: 15901loa – Histology Learning System at Boston University — "Urinary System: neonatal kidney"
    • UIUC Histology Subject 1008


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