Cell Theory.txt

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Mattias Schleiden-German botanist

cells make up not only the stems and roots but every part of a plant
Theodor Schwann-German zoologist

claimed animals are also made up of cells
Rudolph Virchow-German physician

Claimed cells come only from other cells
What are the observations of Schleiden, Schwann, and Virchow called?

Cell Theory
Three parts of Cell theory
- 1. All living organisms are made of one or more cells
- 2. Cells are the basic units of structure and function in organisms
- 3. All cells arise from existing cells.