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bundle sheath

noun

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


bundle sheath

  1. 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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Example Sentences

On account of this bundle-sheath the bundles are called fibro-vascular bundles.

In the vascular bundles of the ground tissue the bundle-sheath is rather prominent and the phloëm portion is well developed.

The larger vascular bundles consist of xylem and phloëm surrounded by a bundle sheath of a single layer of cells.

It is sharply separated from the ground tissue by a row of small cells, called the “bundle sheath.”

There is a bundle sheath of much-flattened cells separating the fibro-vascular bundle from the ground tissue.

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