1839 ⟶ Schwann Proposes All Animal Tissues are Composed of Cells; Cell Theory Expanded

Theodor Schwann proposed that all animal tissues are compose...
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1836
1838
1839
1858

🥩 Schwann Isolates Pepsin, the First Animal Enzyme

Theodor Schwann discovered pepsin in extracts from the stomach lining; first isolation of an animal enzyme.⟶
Schwann Isolates Pepsin, the First Animal Enzyme (1836)
EnzymologyBiochemistryEnzymePepsinSchwannAnimal Biology19th Century
GermanyGermany

🌿 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