Coloured SEM of shafts of human hair

Coloured SEM of shafts of human hair

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This image is part of the feature A Close Look At Hair

Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Human hair. Coloured Scanning Electron Micrograph (SEM) of numerous shafts of human hair. The outer cuticle of flat overlapping scales (or plates) is seen on each hair surface. These scales are thought to prevent hairs from matting together. Hair is made up of a fibrous protein called keratin. Internally the hair shaft is divided into three concentric sheaths (layers) called the medulla, cortex and outer cuticle. Hair is non- living tissue. Its growth occurs when epidermal cells divide at the base of the root bulb. Magnification: x195 at 5x7cm size. x430 at 6x4"

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Keywords: anatomy, hair, hair (h), hair scales, human body, human hair, images, keratin, magnified image, microscopic photos, shaft, subjects, surface

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