Coloured SEM of two hair fibres

Coloured SEM of two hair fibres

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Credit: BSIP PIR/SCIENCE PHOTO LIBRARY

Caption: Hairs. Coloured scanning electron micrograph (SEM) of two hairs. The outer layer of the hair shaft (the cuticle) can be seen, with overlapping scales of dead cells. The scales are thought to be important in preventing the hair matting. Hair is made up of dead cells containing the protein keratin, which is provided by the living bulb embedded in the skin. Hair grows from this root, as the bulb produces more keratin the hair is pushed upwards.

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Keywords: anatomy, cuticle, hair, hair scales, human body, sem

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