31.9 MB (7.1 MB compressed)
3858 x 2894 pixels
32.8 x 24.4 cm ⏐ 12.9 x 9.6 in (300dpi)
SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Nail keratin layers. Coloured scanning electron micrograph (SEM) of layers of keratin within a nail. Here, several nail layers have been peeled back to reveal a flattened interlocking structure for the keratin units. This structure helps explain why nails are hard and also why they are translucent. Keratin is a protein that is also found in skin and hair.
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