epidermis

plant tissue
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Related Topics:
hypodermis
trichome
stinging hair
prickle
root hair

epidermis, in botany, outermost, protoderm-derived layer of cells covering the stem, root, leaf, flower, fruit, and seed parts of a plant. The epidermis and its waxy cuticle provide a protective barrier against mechanical injury, water loss, and infection. Various modified epidermal cells regulate transpiration, increase water absorption, and secrete substances.

This article was most recently revised and updated by Amy Tikkanen.