Cell Theory Historic Timeline

Events

Hans and Zacharias Janssen

1595

Invented compound optical microscope
Made it easier to observe cells

Robert Hooke

1665

Discovered honeycomb-like structure in cork
Coined the term "cell"

Anton van Leeuwenhoek

1675

Observed living bacteria & blood cells
Known as the Father of Microbiology

Matthias Schleiden

1838

Discovered plant were made of cells
Believed plant growth happened throughout production of cells

Theodor Schwann

1839

Stated "all animals were made of cells"
Believed plant & animal cells were different in structure, but "all cells are the basic unit of life"

Rudolph Virchow

1858

Stated "cells can only arise from pre-existing cells"
Stated that diseases caused change in normal cells