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Made by Hans and Zachariah Janssen in 1590. Enabled scientist to discover and study cells.
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Helmont introduced gas to chemistry. He discovered that air was made up of all kinds of different gasses.
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Wrote a book called Micrographia. He observed thin pieces of cork.
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Anton Van Leeuwenhoak was first to view bacteria, life in a drop of water, yeast plants, and blood cells circulating in blood vessels.
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Robert Brown did botanic research in Australia for 3 years collecting about 3400 species.
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Lorenz Oken was a German naturalist and nature philosopher. He published a book where he stated that living things originated from cels.
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Discovered the enzyme Pepsin
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Schleiden discovered that all plants were made of cells
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Von Kolliker was first to describe tissues as consisting of similar cells.
He helped develop the cell theory that cells only come from other existing cells and can not come from nonliving materials. -
Virchow got famos for discovering that an entire organism does not get sick only cells or groups of cells get sick
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Louis Pasteur disproved spontaneous generation.
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Aristotle classified organisms into plants or animals. The animals were classified into animals with red blood and animals without red blood.
