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Lens makers, Zaccharias Janssen and Hans Lippershey invented the microscope. It was called the 'Optical Microscope."
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In 1665, british physicist Robert Hooke used one of the first microscopes to observe a slice of a cork. He saw small objects he called cells.
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Antony van Leeuwenhoek observed living cells for the first time. He also is well known for improving the microscopes that had previously been made.
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The first bacteria was observed in 1676 by Antony van Leeuwenhoek, using a single lens microscope. He called them "animalcules."
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Matthias Schleidan observed plants and concluded that plants are composed of living cells.
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Theodor Schwan investigated and claimed that animals are made of cells as well as plants.
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Rudolf Virchow contributed to the Cell Theory the same year as it started by making the fourth statment, all cells come from pre-exsisting cells.
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The Cell Theory consists of four main points,
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 orginism depends on the well-being of it's cells.
4. Cells come from pre-exsisting cells.
The Cell Theory was finished in 1855 after Virchow came up with the last part in the Cell Theory. -
German zoologist, Karl August Mobius, was the first to use a diminutive of "organ." He first used the word "organula" but the word eventually changed to "organelle."
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The first transmission microscope was made in 1939 as the commercial, finished product. The prototype was made in 1931. The first transmission electron microscope was made by Max Knoll. It is used to observe the inside of cells.
