-
Period: to
Cell Theory Timeline
Cell Theory is composed of three basic principles. The three principles are:
1. All organisms are made of one or more cells
2. The cell is the basic unit of structure and organization in organisms
3. All cells come from preexisting cells -
Zacharias Janssen
Zacharias Janssen produced the first compound microscope by combining two convex lenses within a tube. -
Robert Hooke
Robert Hooke discovered the cellular composition of cork and introduced the word cell into science. -
Francesco Redi
Francesco Redi disproved the phenomenon of spontaneous generation. -
Anton van Leeuwenhoek
Anton van Leeuwenhoek improved the magnification of the microscope by polishing the lense. -
Anton van Leeuwenhoek
Anton van Leeuwenhoek discovered small bacterium he named animalcules. -
Anton van Leeuwenhoek
Anton van Leeuwenhoek discovered bacteria from a saliva he aquiered from his mouth.. -
Caspar Wolff
Caspar Wolff proposed that all organs in animal embryos were composed of globules which could be seen under a microscope. -
Pierre Turpin
Pierre Turpin reported his observations of cell division. -
Franz Meyen
Franz Meyen stated that each cell forms an independent, isolated whole it nourishes and builds itself. -
Robert Brown
Robert Brown discovered the widespread occurrence of nuclei in cells. -
Matthias Schleiden
Matthias Schleiden discovered plants were composed of cells. -
Theodor Schwann
Theodor Schwann discovered that animals were composed of cells. -
Hugo von Mohl
Hugo von Mohl carefully described details of mitosis in plants. -
Rudolph Virchow
Rudolph Virchow stated that all living things come from other living things. -
Louis Pasteur
Louis Pasteur found ways to control and harvest bacteria, disease, and germs; he is also the reason vaccines exist today. -
Gregor Mendel
Gregor Mendel published his investigations of plant hybrids. -
Anton Schneider
Anton Schneider observed and described chromosomes during cell division.
