TIMELINE OF THE DEVELOPMENT OF CELL THEORYBy: Cindy Chen, Sofia Benares, Mahek Tulsiani, Kristel Jalandoni

1595Hans

and Zacharias Janssen

created the first compound microscope

1665Robert Hooke

observed cells in a thin slice of cork.

1680Anton

van Leeuwenhoek observed living cells in scrapings of teeth, rainwater and blood.

1838

Theodor Schwann (biologist) and Matthias Schleiden (physiologist) discover together that both animal cells and plants cells have nuclei.

1839

Theodor Schwann and Matthias Schleiden

formulate cell theory.

1839Schwann publishes

'Microscopic Investigations on the Accordance in the Structure and Growth of

Plants and Animals', outlining cell theory.

1855Rudolf Virchow stated

that all living cells come only from other living

cells

1886August Weismann puts

together cell theory with evolutionary

theory

CELL THEORY The theory that all living things are made up of one or more cells.

http://www.lycos.com/info/matthias-jakob-schleiden.html

MATTHIAS SCHLEIDEN1814-1881

German botanistWrote

“Contributions to Phytogenesis”

Professor of Botani at University of Tartu

http://www.lycos.com/info/matthias-jakob-schleiden.htmlhttp://www.cbu.edu/~seisen/SelectedEventsBiologicalSciences.htm

THEODOR SCHWANN(1810-1882)

German physiologist/zoologist

Formed cell theory with Matthias Schleiden

Published 'Microscopic Investigations on the Accordance in the Structure and Growth of Plants and Animals‘

http://www.takdangaralin.com/science/scientists/scientist-theodor-schwann/

RUDOLF VIRCHOW

German pathologist and statesman, one of the most

prominent physicians of the 19th century. He pioneered the

modern concept of pathological processes by his application of the cell theory to explain the

effects of disease in the organs and tissues of the body.

Oct. 13, 1821 - Sept. 5, 1902

http://www.britannica.com/EBchecked/topic/629797/Rudolf-Virchowhttp://www.schools.utah.gov/curr/science/sciber00/7th/cells/sciber/

cellhist.htm

AUGUST WEISMANN

German biologist and one of the founders of the

science of genetics, who is best known for his

opposition to the doctrine of the inheritance of

acquired traits and for his “germ plasm” theory, the forerunner of DNA theory.

http://www.britannica.com/EBchecked/topic/639121/August-Friedrich-Leopold-Weismann

Jan. 17, 1834 - Nov. 5, 1914

HANS AND ZACHARIAS JANSSEN

•Dutch father and son•Lens grinders•Created the first compound microscope (with 2 lenses) in 1595

"History of Cell Discoveries." Utah State Office of Education - USOE - Welcome. Web. 16 Aug. 2010. <http://www.schools.utah.gov/curr/science/sciber00/7th/cells/sciber/cellhist.htm>.

ROBERT HOOKE•English•In 1665, he observed tiny, hollow, room-like structures in a thin slice of cork which he called ‘cells’ because they reminded him of the cells of a monastery•Only saw the outer walls because they were not alive

"History of Cell Discoveries." Utah State Office of Education - USOE - Welcome. Web. 16 Aug. 2010. <http://www.schools.utah.gov/curr/science/sciber00/7th/cells/sciber/cellhist.htm>.

July 18, 1635 – March 3, 1703

ANTON VAN LEEUWENHOEK •Amateur scientist; originally a fabric merchant•Dutch•Observed blood, rainwater and scrapings of teeth through a simple microscope with one lens in 1680•Observed living cells that he called ‘animalcules,’ some of which are now called bacteria

"History of Cell Discoveries." Utah State Office of Education - USOE - Welcome. Web. 16 Aug. 2010. <http://www.schools.utah.gov/curr/science/sciber00/7th/cells/sciber/cellhist.htm>.

Oct. 24, 1632 - Aug. 26, 1723