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First microscope
-optical microscope
-by lens makers Zaccharias and Hans Janssen -
Cell theory
-refers to the idea that cells are the basic unit and structure of all living things -
Robert Hooke
-First to see cells
-he used the microscope to look at a slice of cork -
Von Leewenhoek
-improved the microscope
-oberved living cells for the first time -
Robert Brown
-discovered the nucleus in the cell and cytoplasmic streaming(plant cells) -
Matthias Schleiden
-figured out that all plants are made of cells. -reconized the importance of the cell nucleus (1831) - -
Schwan
-stated that animals are also composed of cells -main contributors to the cell theory -
Virchow
-oncluded that cells come from pre-existing cells
-he was the first to recognize leukemia cells -
Electron Microscope
-type of microscope that uses a beam of electrons to magnify
-magnifys up to about 10,000,000x
-uses electrostatic and electromagnetic lenses -
Scanning tunneling microscope
-inventors Gerd Binnig and Heinrich Rohrer
-imaging surfaces at the atomic level -gives three-dimensional images of objects
