Hans and Zacharias Janssen- The two were spectacle makers. They created the first microscope so the cell theory later came about.(1595)
Robert Hooke- He looked at a thin slice of cork from the bark of a oak tree through a microscope. He named the small like boxes (cells) after the cells that the monks use to live in because they looked similar.(1665)
Anton van Leeuwenhoek- He looked at pond water and saw the first living cell. He also protozoa and bacteria in cells.(1683)
Robert Brown- He contributed to the determination of how the cell nucleus looked like and how the cytoplasm function.(1833)
Rudolf Virchow- He contribution to the cell theory was that he concluded that all cells are made
by existing cells. He also proposed that to form new cells, the existing cells
divide.(1858)
by existing cells. He also proposed that to form new cells, the existing cells
divide.(1858)
Matthais Schleiden-He said that all plant tissues are composed of cells.(1838)
Theodor Schwann-He said that all animal tissues are composed of cells.(1839)
Albrecht von Roelliker- Discovers that sperm and eggs are also cells.(1840)
Carl Heinrich Braun-Reworks the cell theory, calling cells the basic unit of life.(1845)
Rudolf Virchow-Adds the last part of the cell theory.(1855)