Medullary Ray (other)
Medullary ray may refer to: * Medullary ray (anatomy), the middle part of the Cortical lobule * Medullary ray (botany) Medullary rays are cellular structures found in some species of wood. They appear as radial planar structures, perpendicular to the growth rings, which are visible to the naked eye. In a transverse section they appear as radiating lines from the ...

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. 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 Pyelogram (or pyelography or urography) is a form of imaging of the renal pelvis and ureter. Types include: * Intravenous pyelogram – In which a contrast solution is introduced through a vein into the circulatory system. * Retrograde pyelogram � .... Additional Images File:Slide2iii.JPG, Medullary rays File:Slide23iii.JPG, Medullary rays References External links *  — "Urinary System: kidney, H&E, cortex and medullary ray" *  — "Urinary System: neonatal kidney" * {{genitourinary-stub Kidney anatomy ...
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