Hair root, SEM

Hair root, SEM

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Credit: SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY

Caption: Hair root. Coloured scanning electron micrograph (SEM) of the root (lower right) and part of the shaft (upper left) of a human hair. The base of the hair is known as the hair bulb and is the site of hair growth. It is usually located in a hair follicle in the skin, at the base of which is an area called the dermal papilla. This region is supplied with blood, which gives nourishment for the production of new hair. As new cells form in the follicle they die, become keratinized and pigmented, and get pushed out to form the shaft of the hair. Magnification: x250 when printed 10cm high.

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Keywords: anatomical, anatomy, biological, biology, bulb, coloured, false-coloured, hair, hair root, human body, images, magnified image, microscopic subjects, one, root, scanning electron micrograph, scanning electron microscope, sem, shaft, single, tissue

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