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Dutch lens grinders, produced the first compound microscope.
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Observed tiny. hallow, roomlike structures. Called these structures cells cause they reminded him something monks lived in
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Lookeed at blood, rain water, and scrapings from teeth under a mircroscope.
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Viewed plants under a microscope.
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In 1839 Theo discovered that all animals are made up of cells.
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Stated all livng cells came from previous cells.
