Zacharias Jansen was a Dutch spectade-maker who invented the first micro scope. His microscope had 3 draw tubes with lenses at the ends. You use this micro scope by sliding the draw tube in or out while looking at the sample.
Anton Van Leeuwenhoek was a tradesman and a scientist. The microscope had powerful magnifying glasses. I f you compare our microscope to his, Anton Van Leeuwenhoek microscope is simple.
Robert Hook discovered that we were made of cells. He looked at a cork and saw walls and called them cells.
Theordor Schwann said that plants have the same structure and also that new cells come from old cells.
Matthias Schleiden discovered that plants have cells
Virchow said that all cells come from other cells.