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Cell Theory

The Cell Theory states that all organisms are composed of similar units of organization, called cells. The concept was formally articulated in 1839 by Schleiden and Schwann and has remained as the foundation of modern biology.
Formulation of the cell theory
In 1838 Theodor Schwann and Matthias Schleiden were talking about their studies on cells. It has been suggested that when Schwann heard Schleiden describe plant cells with nuclei, he was stuck by the similarity of these plant cells to cells he had observed in animal tissues. The two published his book on animal and plant cells the next year. Schwann summarized his observations into three conclusions about cells.
1. The cell is the unit of structure, physiology, and organization in living things.
2. The cell retains a dual existence as a distinct entity and building block in the construction of organisms.
3. Cells form by free-cell formation, similar to the formation of crystals.
We know today that the......

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Approximate Word Count: 357
Approximate Pages: 2 (250 words per double-spaced page)

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