J.C. REVY, ISM / SCIENCE PHOTO LIBRARY J.C. REVY, ISM / SCIENCE PHOTO LIBRARY
Skin section. Immunofluorescence light micrograph of a section through human skin. The top layer of the epidermis is the stratum corneum (cornified layer, orange). It is comprised of dead, keratinised flattened skin cells, which are continuously sloughed off and replaced with new cells from below. Below this is the living layer of the epidermis, called the Malpighian layer. This layer contains cells called melanocytes (green and yellow), which produce the pigment melanin. This pigment darkens the skin when it is exposed to sunlight, producing a suntan.
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