EPIDERMIS

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PROTECTIVE TISSUE (EPIDERMIS)

  • Single layer of living cells
  • Flattened
  • No air spaces between
  • Waterproof
  • Airtight
  • Waxy cuticle
  • Can form EPIDERMAL HAIRS

In ROOTs:

Outer protective/enclosing tissues.

Produces root hairs for water uptake. Provides protection from pests and diseases, but does not prevent water-loss in roots.

IN STEMS

Epidermis – single layer of living, tightly packed cells with thickened walls and a waterproof layer called a cuticle. May have stomata. Can produce hair-like growths. Function: protection of under-laying tissues, prevention of water loss, stomata gaseous exchange.