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Hans and Zacharias Janssen
Hans and Zacharias Janssen invent the first compound light microscope. Source: https://www.britannica.com/technology/microscope/History-of-optical-microscopes#ref1255667 -
Robert Hooke
Robert Hooke creates the first compound microscope and observes cork cells. Used the term “cell” to describe the small componentes of the tissue.
Source: cell Packet
Photo source: https://www.biography.com/scholar/robert-hooke -
Francesco Redi
Francesco Redi discovers that when meat decays, it does not produce maggots, but instead eggs are laid by flies to produce the maggots. This shows that cells come from preexisting living cells. Source: https://www.britannica.com/biography/Francesco-Redi -
Anton van Leeuwenhoek
Anton Von Leeuwenhoek creates the first powerful microscopes to observe living cells. He becomes the first person to study bacteria, sperm cells, and Protozoa. Source: cell packet
Photo source: https://www.britannica.com/biography/Antonie-van-Leeuwenhoek -
Robert Brown
Robert Brown concludes from his research that all the cells in plants contain a nucleus. Source: cell packet
Photo Source: http://www.anbg.gov.au/bot-biog/bot-biog-B.html -
Mathias Schleiden
Mathias Schleiden discovers that all plants are made of cells. This is one of the three tenets of the cell theory. Source: cell packet
Photo Source: https://www.britannica.com/biography/Matthias-Jakob-Schleiden -
Theodor Schwann
Theodor Schwann concludes that every animal is made of cells.This is one of the three tenets of the cell theory. Source: cell packet -
Robert Remak
Robert Remak names and discovers the three layers of germ in the early embryo. Source: https://www.britannica.com/biography/Robert-Remak -
Rudolph Virchow
Rudolph Virchow concludes that all cells come from other cells. This is one of the three tenets of the cell theory. Source: cell packet
Photo Source: https://www.britannica.com/biography/Rudolf-Virchow -
Louis Pasteur
Louis Pasteur discovers that microorganisms break down chemicals without the use of oxygen, and the origination of the pasteurization process used in dairy products. Source: https://www.britannica.com/biography/Louis-Pasteur/Research-career
