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Cell Theory & Scientists Involved
Neelab Nazarion 27 November 2012
Transcript of Cell Theory & Scientists Involved
http://www.timetoast.com/timelines/the-cell-theory-timeline Zacharias Janssen: He was a Dutch spectacle-maker from Middelburg, who produced the first compound microscope by combining two convex lenses within a tube and also co-founded the telescope.
Anton van Leeuwenhoek: He was a Dutch tradesman and scientist from Delft, Netherlands, who improved magnification of microscopes by polishing lenses, discovered "animacules", and also discovered bacteria from a sample of saliva from his mouth.
Robert Hooke: He was an English natural philosopher, architect and polymath, who discovered the cellular composition of cork and introduced the word cell to science.
Matthias Shleiden: He was a German botanist and co-founder of the cell theory, who discovered the plants were made up of cells.
Theodor Shwann: He was a German physiologist, who discovered that animals were made up of cells.
Rudolf Virchow: He was a German doctor, anthropologist, pathologist, prehistorian, biologist and politician, who stated that all living things come from other living things.
Louis Pasteur: He was a French chemist and microbiologist, who contributed to the cell theory by disproving spontaneous generation. Zacharias Janssen: His invention of the microscope and telescope helped lead to the rejection of spontaneous generation, because it helped to look at things from a clearer perspective. This all led to the rejection of spontaneous generation because they now know more answers to what they were looking at, if they wanted to see more of the object.
Anton van Leeuwenhoek: Leeuwenhoek’s experiments led him to question the theory of
spontaneous generation that said decaying organic matter spontaneously produced maggots and other small living organisms. In 1692 he wrote that animalcules formed from seeds or germs of other animalcules and, “we are too credulous and therefore assume that living creatures originate from putrefied materials and so on.”
Robert Hooke: During Hooke's experiment he saw tiny "pores" that he thought could have been from the tree when it was alive, thus helping prove the spontaneous generation was false.
Matthias Schleiden: Shleiden helped lead the rejection of spontaneous generation by providing true statements about plants and their organisms.
Theodor Shwann: Shwann extended Shleiden's cell theory to animals, stating that all living things are composed of cells. He believed that new cells form principally outside preexisting cells.
Rudolf Virchow: Virchow published a book in which he rejected the concept of spontaneous generation, which held that organisms could arise from non-living matter. It was believed, for example, that maggots could spontaneously appear in decaying meat.
Louis Pasteur: Pasteur believed that germs existed and carried diseases and that hands spread germs, thus proving spontaneous generation wrong. Works Cited Zacharias Janssen: 1 Jan 1595
Anton van Leeuwenhoek: 1 Jan 1676
Robert Hooke: 1 Jan 1665
Matthias Shleiden: 1 Jan 1838
Theodor Shwann: 1 Jan 1837
Rudolf Virchow: 28 Oct 2011
Louis Pasteur: 1 Jan 1850