Blackhead, SEM

Blackhead, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Blackhead. Coloured scanning electron micrograph (SEM) of a blackhead attached to hairs. The blackhead consists of dead cells and debris, which caused an obstruction in the hair follicle. Blackheads and pimples form when sebum (sebaceous oil) builds up behind this blockage. Magnification: x27.5 when printed 10 centimetres wide.

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Keywords: biological, biology, blackhead, coloured, comedo, dead cells, debris, false-colour, false-coloured, hair, hairs, human, images, magnified image, microscopic photos, obstruction, oil, physiological, physiology, pimple, scanning electron micrograph, scanning electron microscope, sebaceous, sebum, sem, spot, subjects

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