Contributions to Cell theory

Events

Zacharias Janssen

1590

Invented the compound optical microscope, making it easier and more practical to observe.

anton van leeuwenhoek

1632

Made use of the microscope
Single celled organisms called animolcules

Robert Hooke

1665

Discovered the cell

theodor schwann

1838

Plants are composed of cells

Matthias Schleiden

1839

Stated that the different parts of the plant organism are composed of cells

Rudolf Virchow

1855

All cells come from pre-existing cells.

Louis Pasteur

1856

Made discoveries about the role of germs in disease and food spoiling