Mariah Morgan
History of the Cell Theory
The Cell Theory
- All living organisms are composed of cells. They may be unicellular or multicellular.
- The cell is the basic unit of life.
- Cells arise from pre-existing cells.
Scientists
Robert Hooke
Born- July 28, 1635 Freshwater, Isle of Wight
Died- March 3, 1703 London
How he contributed to the cell theory- He did the first set of important observations using a microscope.
Rudolf Virchow
Born- October 13, 1821 Swidwin Poland
Died- September 5, 1902 German Empire
How he contributed to the cell theory- He emphasized that diseases arose, not in organs or tissues in general, but primarily in their individual cells.
Theodor Schwann
Born- December 7, 1810 Neuss Germany
Died- January 11, 1882 Cologne
How he contributed to the cell theory- He verified the existence of cells and he traced the development of many adult tissues from early embryo stages.
Additional Scientists
Anton van Leeuwenhoek
Born- October 24, 1632 Delft, Netherlands
Died- Aug 26, 1723 Delft
How he contributed to the cell theory- First to describe and observe single celled organisms
Matthias Schleiden
Born- Apr 5, 1804 Hamburg, Germany
Died- June 23, 1881 Frankfurt
How he contributed to the cell theory- Matthias came up with the theory that all parts of a plant is made up of cells known as phytogenesis.