Nerve fibre, SEM

Nerve fibre, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Nerve fibres. Coloured scanning electron micrograph (SEM) of nerve fibres (brown). A group of nerves such as this is known as a fasciculus. The bundle is held together by connective tissue in the form of strands of collagen. Each nerve fibre consists of a nerve cell axon, the output process of a nerve cell, covered in an insulating fatty layer known as a myelin sheath. Myelin isolates the nerve from its surroundings, increasing the speed of nerve transmissions. Nerves collect, interpret and relay information. The fibres are used to pass the information on to other parts of the body, such as the muscles and organs like the brain. Magnification unknown.

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Keywords: anatomy, axon, axons, bundle, coloured, fasciculus, fibres, healthy, human body, many, multiple, myelin, myelinated, nerve fibre, nervous, normal, scanning electron micrograph, sem, system

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