STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Skin. Coloured scanning electron micrograph (SEM) of skin from the tip of the finger. The top layer of the skin, the stratum corneum, is composed of dead keratinised cells that are continuously sloughed off and replaced with new cells from below. Magnification: x55 when printed at 10 centimetres wide.
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