Medullary ray (anatomy)

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Medullary ray
System Urinary system

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 to the collecting ducts.

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

References

    This article incorporates text from a public domain edition of Gray's Anatomy.

    External links

    • medullary+ray at eMedicine Dictionary
    • BU Histology Learning System: 16003loa - "Urinary System: kidney, H&E, cortex and medullary ray"
    • BU Histology Learning System: 15901loa - "Urinary System: neonatal kidney"
    • UIUC Histology Subject 1008
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