1. T he Cell T heory
and
How We Got
T here

2. The Cell Theory – a timeline
•
Late 1500’s:
• first lenses used in Europe
• used to determine cloth quality
(weave and precision)
• combos of lenses gave better view

3. Robert Hooke ( 1665)
•
•
Used light microscope to look at
thin slices of plant tissues -- cork
Called tiny chambers
“cells”

4. Anton Von Leeuwenhoek 1673
•
•
•
•
Leeuwenhoek
First to view
pond water
organisms
First to see living
microscopic
organisms
Made careful
sketches

5. Robert Brown 1827
•
Noticed that all cells have a dark region.
Called it the
“Nucleus”

6. Matthias Schleiden 1838
•
•
German Botanist (studied plants)
All plants looked at were made of
cells, so concluded:
“All plants
are made
of cells.”

7. Theodore Schwann -- 1839
•
•
German scientist who studied
animals -- zoologist
Saw that all animals he studied
were cellular so concluded:
“All animals
are made of
cells.”

8. Rudolf Virchow -- 1855
•
German physician who studied
cell reproduction
“Where a cell
exists, there
must have been
a preexisting
cell…..”

9. The Cell Theory
•
•
•
All living things are composed of
cells
Cells are the basic units of
structure and function in living
things
New cells are produced from
existing cells

10. The Cell Theory
•
•
•
All living things are composed of
cells
Cells are the basic units of
structure and function in living
things
New cells are produced from
existing cells