Development of the Cell Theory

Three German scientists, Mattias Schleiden, Theodor Schwann, and Rudolf Virchow were instrumental in development what we call the cell theory. In 1838 Schleiden said that all plants were made from cells. In 1839 Schwann said all animals were made from cells, and in 1855 Virchow said tht all cells come from other cells. Use the timeline below to learn about other events in history related to cells.

To sum up, here is what the cell theory says:

All living things are composed of cells

Cells are the basic units of structure and function in living things

All cells are produced from other cells



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