ANNE WESTON, FRANCIS CRICK INSTITUTE / SCIENCE PHOTO LIBRARY ANNE WESTON, FRANCIS CRICK INSTITUTE / SCIENCE PHOTO LIBRARY
Images not to be used by the tobacco industry.
Dog claw, coloured scanning electron micrograph (SEM). Dog's claws are made from the protein keratin. Keratin is a strong fibrous protein that has structural and protective functions. Keratin is also found in hair, nails, horns, wool and feathers. In this image, showing a small area of a dog claw, the keratin layers can be seen. Magnification: x300 when printed at 10cm wide.
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