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Hans and Zacharias
• Dutch lens grinders, father and son
• Produced first compound microscope (2 lenses -
Period: to
The Development of Cell Theory
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Robert Hooke
• English scientist
• Looked at a thin slice of cork through a compound microscope
• Observed tiny, hollow, room-like structures
• Called these structures 'cells' because they reminded him of the rooms that monks lived in.
• Only saw the outer walls (cell walls) because cork cells are not alive -
Anton Van Leeuwenhoek 1680
Anton van Leeuwenhoek (1680)
• Dutch fabric merchant and amateur scientist
• Looked at blood, rainwater, scrapings from teeth through a simple microscope (1 lens)
• Observed living cells; called some 'animalcules'
• Some of the small 'animalcules' are now called bacteria -
Matthias Schleiden
• German botanist
• Viewed plant parts under a microscope
• Discovered that plant parts are made of cells -
Theodor Schwann
• German zoologist
• Viewed animal parts under a microscope
• Discovered that animal parts are made of cells -
Rudolph Virchow
• German physician
• Stated that all living cells come only from other living cells
