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.

For the structure found in woody plant stems and roots, see Medullary ray (botany).
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
  • Medullary rays
  • Medullary rays
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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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