STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Needle and hair. Coloured scanning electron micrograph (SEM) of a strand of hair (orange, bottom) and a 10/0 gauge suture needle (blue, top). The suture needle is 150 microns in diameter, only twice that of the human hair. Magnification: x 11.
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