Blackhead, SEM

Blackhead, SEM

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Caption: Black head. Coloured scanning electron micrograph (SEM) of hairs emerging from a blockage in the skin. The material which caused the obstruction, the dead cells and debris associated with a pimple or blackhead, is attached to the emerging hair. Blackheads and pimples form when a sebaceous gland becomes blocked with a plug of dried sebum (an oily excretion). Magnification: x180 when printed 10 centimetres wide.

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Keywords: acne, biological, biology, blackhead, block, dead cells, hair follicle, human, obstruction, physiological, physiology, pimple, scanning electron micrograph, sem, skin, spot

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