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Aristotle
Aristotle claffified animals by how complex their inner organs and systems are. -
Jan 12, 1580
Jan Baptist Van Helmont
Considered to be the "founder of Pneumatic Chemistry." -
Zacharias Janssen
Invented the compound optical miroscope with Hand Janssen. This made it easier and more practical to observe cells. -
Invention of the compound microscope
The compound microscope was invented. -
Robert Hooke
Robert Hooke discovered cells. He discovered thwm while looking at a piece of cork, This was the biggest contribution to the cell theory bevause without Hooke Cells may not have been discovered for hundreds of more years. -
Anton Van Leeuwenhoek
One of the first people to observe bacteria cells, which contributed to finding organisms with one cell. He also built and improved telescopes. -
Lorenz Oken
He believed that there were tiny units of life called infusoria that make up the human skin, bones, and organs. -
Robert Brown
Contributed to the cell theory by showing that all living thungs are made of one or more cells. He discovered the cell nucleus while looking at a plant cell. -
Albrecht Von Roelliker
His researches and texts in histology were pioneer contributons to the cell theory. -
Theodor Schwann
Theodor Schwann discovered the cell theory. -
Louis Pasteur
Louis Pasteur disproved spontaneous generation. He was the first scientist to prove that cells can only come from pre-existing cells. -
Rudolf Virchow
Stated that the only source for a cell to be produced is from another cell.Published a book titled "Every cell originates from another existing cell like it." -
Matthias Schleiden
Matthias Schleiden is the co-founder of the cell theory.He contributed to the cell theory by publishing a book about leaves being composed by cells.
