Myelinated nerve fibres, SEM

Myelinated nerve fibres, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Myelinated nerve fibres. Coloured scanning electron micrograph (SEM) of a section through a bundle of nerve fibres containing a blood vessel (red). Each nerve fibre contains a central nerve cell axon (yellow) surrounded by an insulating fatty layer (myelin sheath, purple). Myelin isolates the nerve from its surroundings, increasing the speed of nerve transmissions. Some endoneurial collagen fibres (blue) are also seen. This connective tissue helps to keep the fibres in a bundle together.

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Keywords: anatomical, anatomy, axon, axons, biological, biology, blood vessel, bundle, coloured, connective tissue, endoneurial collagen, false-colour, false-coloured, fibre, fibres, healthy, human body, longitudinal section, myelin, myelinated, nerve, nerves, nervous system, neural, neurological, neurology, neuron, neurone, neurones, neurons, normal, scanning electron micrograph, scanning electron microscope, sectioned, sem, sheath, sheathed

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