The epidermis might be thicker in some plants living in very dry habitats to provide better protection against water loss.
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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.
Sclerenchyma tissue can be found in stems, around vascular bundles, in the veins of leaves, and in the hard covering of seeds and nuts.