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Aristotle invented the field of formal logic. He also found that each germ came from another.
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Zacharias contracted the compound optical microscope. This contributes to the cell theory by making it easier to view cells.
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Jan discovered that the mass of the entire plant was far more than the weight of the displaced original pounds of soil.
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Robert Hooke had discovered plant cells! Hooke's discovery led to the understanding of cells as the smallest units of life, the foundation of cell theory.
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Anton van Leeuwenhoek reported that he had observed "little animals" through a microscope. This proves the cell theory that the microscope shoes tiny things that we normally wouldn't be able to see.
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Lorenz Oken stated "All living organisms originate from and consist of cells" which is the first statement in cell theory.
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Robert Brown stated that all living organisms are composed of cells, Brown's discovery helped to confirm the second half of the cell theory.
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Theodor Schwann came up with the Theory that all plant and animal tissues are composed of cells.
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Matthias was the cofounder of cell theory, the cell as a basic unit of plant structure.
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Albrecht discovered the help of powerful microscopes, that the sperm and egg were composed of cells and that humans are formed of cells.
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Rudolf Virchow came up with the theory that all cells arise from pre-existing cells, which is one of the major points of the cell theory.
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Louis Pasteur proved the theory that cells can only come from preexisting cells. This contributed to the cell theory by disproving spontaneous generation
