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Structures of a leaf in a Dicotyledonous plant - Coggle Diagram
Structures of a leaf in a Dicotyledonous plant
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Xylem
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In one direction, from the roots upwards the leaves
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Continuous hollow lumen allows water to be transported more efficiently from the roots to the aerial parts of the plant
Walls of xylem are thickened with a woody substance called lignin.Lignin strengthens the xylem walls to provide mechanical support to the plant
Phloem
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Sucrose and amino acids are dissolved in water to be transported in the phloem.However, the transport of water is not the main function of the phloem
In both directions in the plant, upwards and downwards
Sieve plates between sieve tube cells have holes to allow rapid flow of manufactured food substances through the sieve tubes
The sieve tube, made up of many sieve tube elements, is relatively hollow.It caontains only cytoplasm
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