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Jansen's MicroscopeZacharias Janssen invented the first compound microscope. While it only magnified between 3 and 9 times, it allowed him to view cells.
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BBC Learning Zone John Baptista von Helmont was arrested for testing his theory on how plants grow. He thought plants ate dirt, but in his experiment found that the amount o dirt was the same while the plant had grown.
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Robert HookeRobert Hooke used Janssen's microscope design to view cell walls in cork. Hooke was the first to use the term "cell"
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Antony van Leeuwenhoek Anton Van Leeuwenhoek discovered protists and bacteria. Also he discovered microscopic nemotodes, red blood cells, spern cells, rotifers and more.
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Anton van LeeuwenhoekLeeuwenhoek Published his discoveries of different types of cells.
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ISISLorenz Oken publlished a scientific, cultural, and historical document called ISIS
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Robert Brown
Robert Brown Developed the distinction between Angiosperms and Gymnosperms. Also he descovered that all cells are controlled by one central nucleus. -
Theodor Schwann (German physiologist)Theodor Schwann discovered the digestive enzyme Pepsin. Defined the cell as the basic unit of animal structure. Used the term "Metabolism" to describe the chemical changes in living tissue.
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Matthias Schleiden\
Matthias Schleiden Published that all plants were made uo of cells. He also tried to allign cell formation with crystal formation. -
Lorenz OkenLorenz Oken published that all living things are made up of cells or vesicle.
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Louis PasteurLouis Pasteur discovered the process of pasreurization. Pasteurization occurs when a liquid is heated and then cooled removing the bacteria. This process later led to the development of vaccines for anthrax and rabies. He also saved the beer, wine, and silk industries in France.
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Rudolph VirchowRudolph Virchow discovered that disease was caused by change in cells. Now diseases could be classified by cells instead of symptoms.
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Albert von Roeliker
Roeliker studied the development of cephalopods and cell structure. In 1948 he founded the Journal of Scientific Zoology. -
AristotleAristotle is known for his many disections and his early understanding of Mendelion genetic concepts.
