Robert Hooke and Anton van Leeuwenhoek played crucial roles in the development of the cell theory, later expanded upon by Matthias Schleiden and Theodor Schwann.
Robert Hooke coined the term 'cell' after observing cork tissue through a lens, while Anton van Leeuwenhoek was the first to see living cells. Later advancements in microscopes and techniques led to the understanding that all living things are composed of cells, as proposed by Matthias Schleiden and Theodor Schwann in the unified cell theory.
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