1838 ⟶ Schleiden Proposes All Plants are Composed of Cells

Matthias Schleiden proposed that all plants are composed of ...
Timelines Logo
Year
1665
1838
1839
1858

🔬 Robert Hooke observes cells in cork

Robert Hooke saw cells in cork using a microscope.⟶
Robert Hooke observes cells in cork (1665)
Cell TheoryMicroscopyRobert HookeBiology17th CenturyScientific DiscoveryCytologyEnglandObservation

🌿 Schleiden Proposes All Plants are Composed of Cells

Matthias Schleiden proposed that all plants are composed of cells.⟶
Schleiden Proposes All Plants are Composed of Cells (1838)
Cell TheoryBotanySchleidenCell Biology19th CenturyBiologyCytology
GermanyGermany

🔬 Schwann Proposes All Animal Tissues are Composed of Cells; Cell Theory Expanded

Theodor Schwann proposed that all animal tissues are composed of cells. Schwann and Schleinden argued that cells are the elementary particles of life.⟶
Schwann Proposes All Animal Tissues are Composed of Cells; Cell Theory Expanded (1839)
Cell TheoryBiologySchwannCell Biology19th CenturyCytologyHistology
GermanyGermany

🔬 Rudolf Virchow proposes cell theory: "Omnis cellula e cellula"

Rudolf Virchow proposed that cells can only arise from pre-existing cells; "Omnis cellula e celulla," all cell from cells. The Cell Theory states that all organisms are composed of cells (Schleiden and Schwann), and cells can only come from other cells (Virchow).⟶
Rudolf Virchow proposes cell theory: "Omnis cellula e cellula" (1858)
Cell TheoryOmnis cellula e cellulaRudolf VirchowBiologyCytology19th CenturyCellular Biology
GermanyGermany