STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Sciatic nerve. Coloured scanning electron micrograph (SEM) of a section through a sciatic nerve, showing the nerve fibres (axons). Connective tissue fibres (thread-like) are also visible. The sciatic nerve is the longest and widest single nerve in the human body, running from the top of the leg to the back of the foot. Magnification: x2300 when printed at 10 centimetres wide.
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