Myelin sheaths surrounding axons CNS, TEM

Myelin sheaths surrounding axons CNS, TEM

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Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Cross section of myelin sheaths that surround axons (human central nervous system), coloured transmission electron micrograph (TEM). Myelinated axons are a portion of a neuron, or nerve cell, that is encapsulated by a fatty layer called the myelin sheath. Myelin sheath insulates and protects the axon of the nerve cell, as well as conducts the electrical impulse along the nerve. Nerves are made up of a network of neurons, specialized cells that send electrical signals either from or back to the central nervous system. Myelinated axons conduct these signals from nerve cell to nerve cell along this pathway, ensuring that the message quickly gets where it needs to go. Magnification: x23,315 when shortest axis printed at 25 millimetres.

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Keywords: 57115b, axon, axon conductivity, axon insulation, brain, central nervous system, cns, colored, coloured, cross section, false-colored, false-coloured, human, human body, human nerve cell, human nerve cells, insulating myelin sheath, mammal, medical, myelin, myelin sheath, myelinated axon, myelinated axons, nerve cell, nerve cell axon, nerve cell axons, nerve cells, neuron, tem, transmission electron micrograph

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