Dermal tissue is found covering the younger primary parts of a plant. These include leaves, roots, stems, flowers, fruits, and seeds. Plant parts that become woody no longer have dermal tissue as their outer layer because it is replaced by periderm, or cork. Just as our own skin serves to protect our bodies, the dermal layer of a plant has the same function. We will discuss this a little later.The epidermiis a single-layer of cells that covers theleavesflowers, roots and stems ofplants. It forms a boundary between the plant and the external environment.s cells 
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