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lens-makers Zaccharias and Hans Janssen
invent the microscope -
Period: to
science
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Robert Hooke
Robert Hooke uses microscope to look at a slice of cork. He names
the small box-like structures he sees "cells" -
Antony Van Leeuwenhoek
improves the microscope and observes living cells for the first time. -
Botanist Matthias Schleiden
concludes that all plants are made of cells.
Schleidan and Schwan's research leads them to develop a theory about cells, which was:
All living things are composed of cells, The cell is the basic unit and structure of all living things and the well-being of an organism bepends on the well-being of its cells -
Theodor Schwan
his investigations allow him to state that animals are also made of cells -
Rudolf Virchow
he expands the cell theory with the statement "cells come from pre-existing cells." -
Phsicist Ernst Ruska and eletrical engineer Max Knoll
they constructed the prototype electron microscope (invented earlier by physicist Leo Szilard).
