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The First Microscope
The microscope was invented by lens makers Zaccharais and Hans Janssen.
The picture shown is the first microscope. -
Compound Light Microscope
The compound light microscope was invented by Zaccharais Janssen. It uses lenses to bend beams of light. It can magnify objects up to two thousand times their size. -
Discovery of Cells
In 1665, Robert Hooke looked at a slice of cork through a microscope. He saw small box-like structures in the cork, and he called them cells. -
Robert Hooke
Robert Hooke was the man who dicovered cells in 1665. -
Antony van Leeuwenhoek
Antony van Leeuwenhoek improved the microscope ten years after Robert Hooke discovered cells, and observed living cells for the first time. -
Matthias Schielden
Matthias Scheilden stated that all plants are made of cells in 1838. -
The Cell Theory
The Cell Theory consists of four theories about cells, contributed by Matthais Schleiden, Theodore Schwan, and Rudolf Virchow all contributed to the Cell Theory.
1) All living things are composed of cells
2) The cell is the basic unit and structure of all living things
3) The well-being of an organism depends on the well-being of its cells
4) Cells come from preexisting cells -
Theodor Schwan
Theodor Schwan stated that animals are also made of cells, after Matthias Schleiden discovered that plants are made of cells. -
Rudolph Virchow
Rudolf Virchow contributed to the Cell Theory, saying that "All cells come from preexisting cells." -
Electron Microscope
The first elecron microscope was built in 1931 by a man named Ernest Rusk. The electron microscope can magnify objects up to one million times their size. It can bend beams of electrons using a magnetic field.
