Tj789
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The most obvious feature is that they transport water and minerals, but they also support the plant but how?
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stic10
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Their walls are made up of lignin tissue which prevents it from collapsing when the pressure drops!
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saadsway
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xylem vessels have end cross walls which form a hollow tube this tube like structure allows strutural support and keeps the plant upright.
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Jmedi
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Xylem vessels are made of lignin, which waterproofs the cells, the cells die and their contents decay. This lignin strengthens the vessel walls and prevents the xylem itself from collapsing. The xylem vessel does have some flexibility.
It supports the plant by supplying the soluble minerals and water to the upper parts of the plant, leaves for example.
Larger plants use the xylem to hold themselves up.
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