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Hans and Zacharias Janssen found out how to microscopic the cells -
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Robert Hooke FRS was an English natural philosopher, architect and polymath. His adult life comprised three distinct periods: as a scientific inquirer lacking money; achieving great wealth and standing -
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Theodor Schwann was a German physiologist. His many contributions to biology include the development of cell theory, the discovery of Schwann cells in the peripheral nervous system -
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Matthias Schleiden Schleiden was educated at Heidelberg (1824–27) and practiced law in Hamburg but soon developed his hobby of botany into a full-time pursuit. Repelled by contemporary botanists’ emphasis on classification, Schleiden preferred to study plant structure under the microscope. While professor of botany at the University of Jena, he wrote “Contributions to Phytogenesis” (1838), in which he stated that the different parts of the plant organism are composed of cells -
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Virchow was the only child of a farmer and city treasurer in Schivelbein, Germany. He had a strong interest in natural science. In 1839, he received a scholarship from the Prussian Military Academy, where he was given the opportunity to study medicine in preparation for a career as an army physician. He studied medicine in Berlin and then taught there for the most of his life, with interludes in Silesia and Würzberg. -
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Leeuwenhoek succeeded in making some of the most important discoveries in the history of biology. It was he who discovered bacteria, free-living and parasitic microscopic protists, sperm cells, blood cells, microscopic nematodes and rotifers, and much more.
