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Zacharias Janssen invents the compound microscope.
Davidson, Michael. (August 1, 2003). Zacharias Janssen. Retrieved September 20, 2015 from http://micro.magnet.fsu.edu/optics/timeline/people/janssen.html. -
Robert Hooke was heavily involved with the design of microscopes.
Davidson, Michael. (August 1, 2003). Robert Hooke. Retrived September 20, 2015 from http://micro.magnet.fsu.edu/optics/timeline/people/hooke.html. -
Anton van Leeuwenhoek discovered single-celled organisms.
History of the MIcroscope. (2010). Anton van Leeuwenhoek: A history of the compound microscope. Retrieved September 20, 2015 from http://www.history-of-the-microscope.org/anton-van-leeuwenhoek-microscope-history.php. -
Matthias Schleiden cofounded the cell theory.
The Editors of Encyclopedia Britannica. (November 11, 2014). Matthias Jacob Schleiden. Retrieved September 20, 2015 from http://www.britannica.com/biography/Matthias-Jacob-Schleiden. -
Theodor Schwann cofounded the cell theory.
The Editors of Encyclopedia Britannica. (June 12, 2015). Theodor Schwann. Retrieved September 20, 2015 from http://www.britannica.com/biography/Theodor-Schwann. -
Rudolf Virchow studied the effects of disease on the human body.
Famous Scientists. (2015). Rudolf Virchow. Retrieved September 20, 2015 from http://www.famousscientists.org/rudolf-virchow/. -
All living organisms are composed of cells. They may be unicellular or multicellular.
Regina, Bailey. (n.d.). Cell Theory. Retrieved September 18, 2015 from http://biology.about.com/od/biologydictionary/g/celltheory.htm. -
The cell is the basic unit of life.
Regina, Bailey. (n.d.). Cell Theory. Retrieved September 18, 2015 from http://biology.about.com/od/biologydictionary/g/celltheory.htm. -
Cells arise from pre-existing cells.
Regina, Bailey. (n.d.). Cell Theory. Retrieved September 18, 2015 from http://biology.about.com/od/biologydictionary/g/celltheory.htm.
