The waxy, water-resistant layer aids in protection against loss of water, mechanical injury, and invasion by parasitic fungi.
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The epidermis might be thicker in some plants living in very dry habitats to provide better protection against water loss.
The outermost layer of cells in a plant is called the epidermis.
There is often no internal space inside sclerenchyma cells because the walls are so thickened with lignin.
Sclerenchyma is a type of permanent tissue that makes the plant hard and stiff, providing strength to the plant parts.