Cell Theory


Zacharias Janssen

1590 - Approx. 1632

Zacharias created the microscope with the help from his dad, Hans, which permitted English researcher Robert Hooke to use a primitive microscope to examine the cell wall of a piece of cork in 1663.

Robert Hooke

1663 - 1665

The cell was found by Robert Hooke in 1665. He analyzed thin slices of cork and saw a large number of small pores that he said resembles the room a monk would live in. In view of this affiliation, Hooke called them cells.

Anton Van Leeuwenhoek

1674 - 1683

Anton Van Leeuwenhoek was the first to examine and describe bacteria, yeast plants, the life in a drop of water, and the circulation of blood corpuscles in capillaries. He was self-taught methods for grinding and polishing tiny round lenses which gave magnification up to 270x diameters, the finest known at the time.

Matthias Schielden

1839 - Approx. 1850

Matthias Schielden stated that different parts of plant organisms are made of cells. He also recognized that the nucleus was very important

Theodor Schwan

1839 - Approx. 1850

Theodor schwan discovered modern histology by recognizing the cell as the basic unit of animal structure and then propose that all animals are made of cells. Later, Theodor and Matthias schielden together devised the cell theory of life.

Rudolf Virchow

1855 - Approx. 1865

Rudolf Virchow witnessed under the microscope cells dividing. He said that not all plants are made up of cells, that help lead to the creation of cell theory

Louis Pasteur

1865 - Approx. 1875

Louis Pasteur was the first scientist to prove that cells can only form from pre existing cells. He did that by creating an experiment that showed cells would only grow in broth if air was exposed