SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Skin surface. Coloured scanning electron micrograph (SEM) of the surface of the skin of a 6-year-old. The outermost surface is composed of dead and dying skin cells from the underlying epidermis, which help to protect the delicate epidermal cells from the external environment. Magnification: x50 when printed at 10 centimetres wide.
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