The Cell Theory Timeline

Events

The Devlopment of The Microscope

1590

Hans & Zacharias Janssen produced the first compound microscope.

First cells were found

1665

Robert Hooke was the first person to call the spaces in cork cells.

Cells were observed through a microscope

1680

Anton van Leeuwenhoek observed living cells through a microscope.

Plant cells are found

1838

Matthias Schleiden discovered plant are made of cells.

Animal cells are found

1839

Theodor Schwann discovered animals are made of cells.

Second part of the cell theory

1845

Carl Braun restates the second part of the cell theory proposing that cells are the basic unit of life.

Third part of cell theory

1855

Rudolph Virchow adds a third part of the cells theory and state that cells only come from other living cells.

Modern Compound light Microscope

1886

German scientists Ernst Abbe made a compound microscope with complex lenses.

Transmission Electron Microscope

1933

German physicist Ernst Ruska created the first electronic micrscope.

Scanning Electon Microscope

1965

An SEM sends electrons over the surface of a specimen rather than through it.