SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Skin surface. Coloured scanning electron micrograph (SEM) of the surface of the skin (red) 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 x33 when printed 10 centimetres wide.
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