STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Eyebrow hair and skin. Coloured scanning electron micrograph (SEM) of eyebrow hair growing from the surface of human skin. The shafts of hair (brown) are anchored in their individual hair follicles (not seen) below the surface of the skin (pink). Hair is made up of a fibrous protein called keratin. The outermost skin layer, the stratum corneum, consists of keratinized dead cells that detach from the body. The squamous (flattened) cells that make up the stratum corneum arise from the lower, living layers of skin. Magnification: x100 at 6x7cm size.
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