STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Nerve support cell. Coloured scanning electron micrograph (SEM) of an oligodendrocyte cell. This cell forms the myelin sheaths around nerve fibres in the central nervous system (brain and spinal cord). The myelin provides nutrients, structural support and insulation, allowing nerves to conduct signals more quickly. One oligodendrocyte may be responsible for the myelination of up to 50 nerve fibres.
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