DR TONY BRAIN / SCIENCE PHOTO LIBRARY DR TONY BRAIN / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of the overlapping, squamous cells of the skin (epidermis) of the human foot. These cells comprise the ridges and grooves of the sole of the foot, which appear in early embryonic development and are determined by hereditary factors. Magnification: x750 at 35mm size, x1750 at 8x10- inch size.
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