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bundle sheath
noun
, Botany.
- a layer of cells in plant leaves and stems that surrounds a vascular bundle.
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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Example Sentences
On account of this bundle-sheath the bundles are called fibro-vascular bundles.
From Project Gutenberg
In the vascular bundles of the ground tissue the bundle-sheath is rather prominent and the phloëm portion is well developed.
From Project Gutenberg
The larger vascular bundles consist of xylem and phloëm surrounded by a bundle sheath of a single layer of cells.
From Project Gutenberg
It is sharply separated from the ground tissue by a row of small cells, called the “bundle sheath.”
From Project Gutenberg
There is a bundle sheath of much-flattened cells separating the fibro-vascular bundle from the ground tissue.
From Project Gutenberg
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