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Invented by Zaccharias an Hans Janssen
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He used the first microscope to examine a slice of cork.
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He improved the first microscope and observed living cells for the first time.
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He found that all cells contain of a nucleus.
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He discovered the cytoplasm which is only found in plant cells.
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He stated that all plants are made of cells. He is a main contributor to The Cell Theory.
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He stated that animals are also made up from cells. He is also a main contributor to The Cell Theory.
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He is a contributer to The Cell Theory. Rudolf stated that "Cells come from preexisting cells."
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Ernst Ruska and Matt Knoll invented the electron microscope in Germany.
