Transcript Scientists and Cell History notes

SCIENTISTS AND CELL
HISTORY
Know the following scientists and their contributions to
cell history
HOOKE
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Created the first compound microscope
Viewed cork – observing tiny empty compartments
Given Latin name cellulae (meaning small rooms)
Origin of the biological term “cell”
LEEUWENHOEK
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Was inspired by Hooks research
Created his own simple microscope (better
than Hooke’s)
Was the first scientist to discover bacteria
SCHWANN
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Zoologist
Discovered that all animals are composed of cells
SCHLEIDEN
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Botanist
Discovered that all plants are composed of cells
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VIRCHOW
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Proved that cells divide and create other
cells
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PASTEUR
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Disproved spontaneous generation
OBSERVATIONS AND
CONCLUSIONS OF THESE
SCIENTISTS
ARE CREDITED WITH
THE CELL THEORY!!
CELL
THEORY
The cell is the basic unit of structure and
function in all living things
 All cells come from pre-existing cells
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Binocular scope
Dissecting scope
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Allows low
magnification of threedimensional objects
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Resolution: 10X-40X
Compound Microscope
Light Microscope
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Magnification of objects
that are thin enough for
light to pass through
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Resolution: 40X- 400X
Electron microscopes (2 types)
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magnify things on a fine
scale to create a highlymagnified image
Uses a beam of electrons
to make image
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Resolution: 5000X2,000,000X
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This resolution is 1,000
times greater than a light
microscope and about
500,000 times greater
than that of a human eye.
Scanning Electron Microscope
magnify the surface
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Up to 100,000X
Transmission Electron Microscope
electrons pass completely through
Insides of objects
 Up to 1 million times
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