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Contribute #1
The microscope was built by Zacharias Janssen, probably with the help of his father Hans. -
Period: to
The creation of a theory.
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''contribute #2
Robert Hooke's investigated the colours of membranes and of thin plates of mica, and established the variation of the light pattern with the thickness of the plates. -
Contribute #3
Anton Van Leeuwenhoek was the first to see and describe bacteria (1674), -
Contribution #5 - Theodor Schwann
He discovered the digestive enzyme pepsin. -
Contributions of Phytogenesis - Matthias Schleiden
Schleiden wanted to make cell formation analogous to crystal formation, and published his results in Beiträge zur Phytogenesis. -
Contribution #7 - Rudolph Virchow
In 1839, he extended Schleiden's cell theory to animals, stating that all living things are composed of cells. -
Contribution #8 - Rudolph Virchow
He summarized the cell theory with the Latin phrase "omnis cellula a cellula" (all cells arise from cells).