The important functions of the epidermal cells are:
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It acts as a protective layer which protects the internal tissue from the mechanical injuries. The extra protection is given by the layer cutin, wax, lignin, hairs on the epidermis.
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It reduces the loss of water by excessive transpiration.
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Certain xerophytic plants stores water and food materials in the form of mucilage in the epidermis
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Sharp and stiff hairs protect the plants from the grazing.
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Certain epidermal cells also possess chlorophyll which aids in the photosynthesis.
