Primary xylem is the xylem that is formed during primary growth from procambium.
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This causes a positive pressure that forces sap up the xylem towards the leaves.
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It also allows plants to draw water from the root through the xylem to the leaf.
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Xylem and phloem tissues are involved in the conduction processes within plants.
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The bacterium involved lives in the water-conducting xylem tissue of the plant.
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And don't let the trunk dry out or it will heal over and block the xylem again.
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Removing leaves also reduces cavitation which can damage xylem vessels in plants.
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Many fern stems have phloem tissue on both sides of the xylem in cross-section.
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This tissue divides off cells that will be become additional xylem and phloem.
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More examples
The woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels
Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The basic function of xylem is to transport water from roots to shoot and leaves, but it also transports some nutrients. The word xylem is derived from the Greek word u03BEu03CDu03BBu03BFu03BD (xylon), meaning "wood"; the best-known xylem tissue is wood, though it is found throughout the plant.
A vascular tissue in land plants primarily responsible for the distribution of water and minerals taken up by the roots; also the primary component of wood
Tissue within plants which conducts water and mineral salts, absorbed by roots from the soil, throughout the plant. Xylem tissue consists of long continuous tubes formed from columns of cells in which the horizontal cross-walls have disintegrated and the cell contents have died. ...
Tissue in the vascular system of plants that moves water and dissolved nutrients from the roots to the leaves; composed of various cell types including tracheids and vessel elements. Plant tissue type that conducts water and nutrients from the roots to the leaves.
The area of the tree trunk that is comprised of the heartwood and sapwood.
Plant tissue through which all water and dissolved nutrients are conducted (see also tracheid and hydroid).
Vascular tissue designed to help transport water and minerals from the root to the leaves. The most primitive of the xylem vessels is the tracheid. All plants which use tracheids are called tracheophytes
Vascular tissue whose principal function is the upward translocation of water and solutes; see also primary xylem or secondary xylem.