jan 1, 1839 - The Discovery of all Animals have Cells

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Theodor Schwann came to the conclusion that all animals are composed of cells in 1839. Schwann supported Matthias Schleiden's claimed that cells are organisms, all organisms consist of one or more cells, and the cell is the fundamental structural component of all organisms by drawing on previous facts. Theodor also claimed that combinations of these structures make up both plants and animals. Two of the three focal principles of cell theory resulted from this evolution.

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