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Transcript 
The Cell
Theory
Important Scientists
• Many important scientists aided in the
discovery of the cell and the formulation of
the cell theory
Zacharias Janssen
1580-1638
• Dutch scientist
• Built a compound
microscope with his
father in 1595
Anton Von Leeuwenhoek
1632-1723
• Dutch scientist that
made the first simple
microscope
• Discovered bacteria
Robert Hooke
1635-1703
• Came up with the word
"cell" after studying
cork under the
microscope
• Wrote Micrographia
Matthias Schleiden
1804-1881
• German botanist who
concluded that all
plants are made of cells
Theodor Schwann
1810-1882
• German physiologist
that concluded all
animals are made of
cells
Rudolf Virchow
1821-1902
• German histologist that
concluded all cells come
from other cells
The Cell Theory
• All organisms are made of cells.
• Cells are the basic units of structure and
function for all living things.
• All cells come from other cells.
The Cell
• The basic unit of structure and function of
living things
Prokaryote
• Cells that do not have a
nucleus or other cellular
compartments
• The first cells were
prokaryotes
Eukaryote
• Cells that have a
nucleus surrounded by
a nuclear membrane
Unicellular
• Organism composed of
one cell
Multicellular
• Organism composed of
many cells
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