The history of the cell theory
The microscope can do an incredible thing. If no one invented the microscope, no one would know what cells are. On July 18, 1635, Robert Hook Discovered cells. He used a microscope to figure out what the little organisms were.The way Robert Hook named the cells " cells" is by when he looked at them. It looked like little empty rooms like jail cells.
The cell theory
The cell theory has three basic parts. (1) everything living thing is composed of other cells. (2) cells come from other cells. (3) the cell is the smallest basic unit of life. The cell theory was developed by the scientists Matthias Schleiden, Theodor Schwann, and Rudolph Virchow. In 1838 Matthias discovered that all plants were composed of cells. Then in 1839 Theodor discovered that all animals were composed of cells. In 1855 Rudolph was experimenting diseases and discovered that all cells come from other existing cells.