DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY
False-colour scanning electron micrograph (SEM) of three human hairs, showing their cut ends. Hair consists largely of keratin. In this image, the suface of the hair shaft at centre displays the overlapping keratin plates, or scales, that are believed to reduce hair matting. Magnification: x200 at 35mm size.
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