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    Schwann, Theodor
    /SHwän/
    • 1. (1810–82), German physiologist; full name Theodor Ambrose Hubert Schwann. He showed that animals (as well as plants) are made up of individual cells and that the egg begins life as a single cell. He also discovered the cells that form the myelin sheaths of nerve fibers (Schwann cells).

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