Section through a Yew tree twig

Section through a Yew tree twig

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Credit: SIDNEY MOULDS/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a transverse section through a yew tree (Taxus sp. ) twig, showing the pith (green & brown, bottom) and xylem (pink, top). The pith forms the central core of the young stem and is composed of parenchyma tissue. The xylem is composed of vertical, pillar-like cells (seen here in cross- section) which conduct the sap upwards from the tree roots. It is crossed by horizontal vascular rays (green), which supply it with nutrients. Magnification: x50 at 35mm size.

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Keywords: botany, gymnosperm, nature, pith, plant, plants, rays, taxus sp., transverse, vascular, vascular ray, xylem, yew tree

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