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Invented the compound optical microscope
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Became the first paid scientist
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Discovered the cell through experiments and use of microscopy (using a microscope)
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Learned how to grind lenses and made simple (practical) hand-held microscopes
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Anton Van Leeuwenhoek was the first to see and describe bacteria
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Discovered the enzyme Pepsin
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Through a variety of fermentation experiments, Schwann identified the role of microorganisms in putrefaction and alcohol fermentation
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Used experiments to prove the theory of spontaneous generation incorrect
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Contributed to the cell theory by reporting in 1838 that plant tissues are constructed from individual cells
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Made observations on protoplasmic streaming and his study of mycorrhizae
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Wrote a book about the cellular structure of plants and animals and the development of adult cells. It proposed the cell doctrine or cell theory – that all living things are made of cells
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Wrote the first textbook to include a discussion of plant cytology
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Proved the cell theory showing all cells come from other cells proving non-living things can't produce living ones
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Observed diseased cells come from other cells
