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Flowering plants have system of vessels that runs up and down the plants carrying material. These vessels are called transport or vascular tissues.

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Tissues that belong to the transport system:
Xylem
Phloem

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Conducting ater and dissolved mineral salts from the roots to salts from the roots to the stems and leaves

Proving mechanical support for the plant

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Companion cell have many mitochondria , which privide the energy needed for the copaion cell to load sugars from the mesophyll cells into the sieve tubes by active transports.

The holes in the sieve plates allow rapid flow of manufactured food substances through the sieve tubes.

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1)Each root hair is a fine tubular outgrowth of an epidermal cell. It grow between the soil particles, coming into close contact with the soil solution surrounding them
2)The thin flim of liquid surrounding each soil particle is a dilute solution of mineral salts
3) The sap in the root hair cell is a relatively concretrated solution of sugars and various salts
4) The entry of water dilutes the sap.
5) Similary, water passes from cell B into the next cell of the cortex.