History of Cell Discovery Cells are the basic
History of Cell Discovery
Cells are the basic unit of structure and function in living things
Robert Hooke 1635 – 1703
Hooke was one of the first people to observe cells
He published a book, Micrographia, in 1665. It had ideas about: the life cycle of mosquitoes origin of craters on the moon fossils and drawings of microscopic things.
Thin slices of cork from the cork tree. (tiny rooms – cells) He was really looking at dead cells – what was left was the cell wall.
Anton van Leeuwenhoek (1632 -1723)
Anton van Leeuwenhoek’s simple microscope
He looked at: drops of lake water scrapings from gums and teeth water in rain gutters He saw tiny moving organisms and called the wretched beasties “animalcules. ”
Bacteria from the mouth
200 years later…
Matthias Schleiden (1804 -1881) German botanist 1838 he suggested that all plants are made of cells
Theodor Schwann (1810 -1882) German zoologist 1839 suggested that animals, not just plants are made of cells
Rudolf Virchow (1821 -1902) German doctor 1855 “all cells come from cells”
The work of these last three men led to…
The Cell Theory
The cell theory states: All living things are made of cells
The cell theory states: Cells are the basic unit of structure and function in living things
The cell theory states: Living cells only come from other living cells
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