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metal prints axon metal prints biological metal prints biology metal prints collagen metal prints coloured metal prints connective tissue metal prints cytoplasm metal prints endoneurium metal prints false colour metal prints false-coloured metal prints fatty metal prints human body metal prints images metal prints insulated metal prints myelinated metal prints

photographs axon photos biological photos biology photos collagen photos coloured photos connective tissue photos cytoplasm photos endoneurium photos false colour photos false-coloured photos fatty photos human body photos images photos insulated photos myelinated photos

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Myelinated nerve. Coloured transmission electron micrograph (TEM) of part of a myelinated nerve fibre. Myelin (brown) is an insulating fatty layer that surrounds nerve fibres (axon, purple), 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 (pink) and is known as the nuerolemma or sheath of Schwann. The nerve fibres are surrounded by endoneurium a delicate connective tissue that contains collagen (yellow). Magnification: x25, 000 when printed at 10 centimetres wide.

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