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Zacharias Jansen
Jansen produced the first compound microscope by combining two convex lenses within a tube. -
Robert Hooke
Hooke discovered the cellular composition of cork and introduced the word "cell" to science. -
Francesco Redi
Redi disproved the phenenomon of spontaneous generation. -
Anton van Leeuwenhoek
Leeuwenhoek discovered "animacules" (bacteria). -
Caspar Wolff
Wolff proposed that all organs in animal embreyos were made of globules which could be seen under a microscope. -
Henri Dutrochet
Dutrochet stated that all organic tissues are actually globular cells of exceeding smallness, united by simple and adhesive sources. -
Franz Meyen
Meyen stated that each cell forms an independent, isolated whole it nourishes and builds up itself. -
Robert Brown
Brown published his observations reporting the discovery and widespread occurence of nuclei in cells. -
Matthias Schleiden
Schleiden discovered that plants were made up of cells. -
Theodor Schwann
Schwann discovered that animals were made up of cells. -
Hugo von Mohl
Mohl carefully described details of mitosis in plants. -
Rudolph Virchow
Virchow stated that all living things come from other living things. -
Louis Pasteur
Pasteur showed that growth of bacteria is not due to spontaneous generation, but biogenesis-living things come from living things. -
Gregor Mendel
Mendel published his investigations of plant hybrids. -
Anton Schneider
Schneider observed an described chromosomes during cell division. -
Cell Theory Basic Principles
- All organisms are composed of one or more cells.
- The cell is the basic unit of structure and organization in organisms.
- All cells come from preexisting cells.
