Myelinated nerve, TEM

Myelinated nerve, TEM

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Credit: THOMAS DEERINCK, NCMIR/SCIENCE PHOTO LIBRARY

Caption: Myelinated nerve. Coloured transmission electron micrograph (TEM) of myelinated nerve fibres and Schwann cells. Myelin (red) is an insulating fatty layer that surrounds nerve fibres (axons, yellow), increasing the speed at which nerve impulses travel. It is formed when Schwann cells wrap around the fibre, depositing layers of myelin between each coil. The outermost layer consists of the Schwann cell's cytoplasm (green) and is known as the neurolemma or sheath of Schwann.

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Keywords: anatomy, axon, biological, biology, cell, coloured, cytoplasm, endoneurium, false-coloured, fatty, fibre, fibres, human body, insulated, insulating, insulation, micrograph, myelin, myelinated, nerve, nerve fibre, nervous, neurolemma, neurological, neurology, neuron, neurone, neuroscience, phospholipid, schwann cell, sheath, sheath of schwann, sheathed, system, tem, transmission electron, transmission electron microscope

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