Medullary-ray



noun, Botany.
1.
(in the stems of woody plants) one of the vertical bands or plates of unspecialized tissue that radiate between the pith and the bark.
noun
1.
any of the sheets of conducting tissue that run radially through the vascular tissue of some higher plants

medullary ray n.
The center of the renal, cortical lobule, consisting of the ascending or descending limbs of the nephronic loop or of the collecting tubules. Also called Ferrein’s pyramid.

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  • Medullary-sheath

    noun 1. Botany. a narrow zone made up of the innermost layer of woody tissue immediately surrounding the pith in plants. 2. Anatomy. . noun 1. (anatomy) a myelin layer surrounding and insulating certain nerve fibres 2. a layer of thick-walled cells surrounding the pith of the stems of some higher plants medullary sheath n. […]

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    medullary space n. The marrow-filled central cavity together with the cellular intervals between the trabeculae of bone.

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