M EET THE S CIENTISTS : D EVELOPING THE C ELL T HEORY.
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Transcript of M EET THE S CIENTISTS : D EVELOPING THE C ELL T HEORY.
MEET THE SCIENTISTS: MEET THE SCIENTISTS: DEVELOPING THE CELL DEVELOPING THE CELL THEORYTHEORY
WHAT IS A CELL? The cell is the basic unit of structure
and function in living organisms, including plants and animals.
ALL LIVING THINGS ARE MADE OF CELLS
Plants Animals
TOOL USED TO VIEW CELLS
The microscope is used to magnify extremely small objects.
TIMELINE - 1590
Hans and Zacharias Janssen (1590) Dutch lens grinders
Father and son
Produced first compound microscope (two lenses)
TIMELINE - 1665
Robert Hooke (1665) English scientist Looked at a thin slice of cork through a
compound microscope and observed tiny, hollow room-like structures
He called them cells, but he only saw the outer cell walls because the cork cells were not alive.
TIMELINE - 1680
Anton van Leeuwenhook (1680)
Dutch amateur scientist
Looked at blood, rain water, and scrapings from teeth through a simple microscope.
He called the structures he saw “animalcules”.
TIMELINE - 1838
Matthias Schleiden (1838)
German botanist
Viewed plant structures under a microscope and discovered that they were made of cells
TIMELINE - 1839
Theodor Schwann (1839)
German zoologist
Viewed animal tissue taken from animal organs under a microscope and discovered the tissue was made of cells
TIMELINE - 1855
Rudolph Virchow (1855)
German physician
Stated that living cells come only from other living cells (This is a part of cell theory.)