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In 1665, Robert Hooke discovered plant cells from looking at a slice of cork under a microscope and called them 'cellula', which means 'small room' in latin. The idea of cells came from this discovery of Robert Hooke.
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In 1670, Antonie van Leeuwenhoek was the first person to describe bacteria and protozoa.
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In 1833, Robert Brown discovered the nuclues in plant cells.
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In 1838 Mathian Jakob Shleiden made a careful study of plant issue and discovered sperm and red blood cells. Mathian also observed creatures made of single cells and gave them their name of 'animacules.'
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In 1839, Theodor Schwann pullsed exisisting obsevations into theory that stated 1. Cells are organisms. 2. All organisms consist of one or cells. 3. Cells are the basic structure unit for all organisms. 4. Plants and animals consist of combinations of organisms which are arranged in accordance with definite rules. Theodor also discovered that cells have common features like a nucleus.
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In 1855, Rudolph Virchow confirmed that the origins of cells are the division of pre-exisisting cells.
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