<prompt> The epidermis of a plant is specialized tissue, composed of parenchyma cells, that covers the external surfaces of leaves, stems and roots. Several cell types may be present in the epidermis. Notable among these are the stomatal guard cells that control the rate of gas exchange between the plant and the atmosphere, glandular and clothing hairs or trichomes, and the root hairs of primary roots. In the shoot epidermis of most plants, only the guard cells have chloroplasts. Chloroplasts contain the green pigment chlorophyll which is needed for photosynthesis. The epidermal cells of an organs arise from the superficial layer of cells known as the tunicacular L1 and L2 layers that covers the plant apex, whereas the cortex and vascular tissues arise from the apex of the plant and the atmosphere.  <response>: kugadzira cutin 