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For a healthy nervous system, axons—the long projections of our nerve cells that run throughout our bodies—must be properly insulated.

Much like conventional power cords need electrical insulators around the conducting wires for efficient and effective transfer of current, axons rely on multiple bilayers of myelin to maintain a rapid and optimal transfer of impulses between, for instance, brain and organ, or spinal cord and muscle. These bilayers are composed of lipids (fat molecules), protein, and water...... Read More - http://www.ms-uk.org/myelin