bundle sheath


noun Botany.

a layer of cells in plant leaves and stems that surrounds a vascular bundle.

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Example sentences from the Web for bundle sheath

Scientific definitions for bundle sheath

bundle sheath

A layer or region of compactly arranged cells surrounding a vascular bundle in a plant. The bundle sheaths regulate the movement of substances between the vascular tissue and the parenchyma and, in leaves, protect the vascular tissue from exposure to air.
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