Cells are Us Cell Biology 2/24/2019 Red and white blood cells above vessel-forming cells. A person contains about 100 trillion cells. That’s 100,000,000,000,000.

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Students Will: summarize the contributions scientists have made toward the cell theory state the cell theory.
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Cells are Us Cell Biology 2/24/2019 Red and white blood cells above vessel-forming cells. A person contains about 100 trillion cells. That’s 100,000,000,000,000 or 1 x 1014 cells. There are about 200 different cell types in mammals (one of us). nerve cell Cells are tiny, measuring on average about 0.002 cm (20 um) across. That’s about 1250 cells, “shoulder-to-shoulder” per inch. G. Podgorski, Biol 1010

Robert Hooke - 1665 Coined the term “Cells”.

Leeuwenhoek -father of the microscope; viewed living cells (in pond water) in 1674

Schleiden, Schwann, Virchow Three German scientists Worked independently The things they each discovered were brought together to form the Cell Theory- 1885

Schlieden: Studied plants In 1838 concluded that all plants were made of cells Schwann- 1839- studied animals, concluded that all animals were made of cells Virchow-1855 put it all together and said all things made of cells and all cells come from cells

The Cell Theory All living things are made of cells Cell is the basic unit of structure & function for all living things All cells come from other cells

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