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FOUNDERS OF CELL THEORY
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ROBERT HOOKE• Robert Hooke
used a _______ microscope to study ________ (obtained from dead oak bark)
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ROBERT HOOKE• He called them
_______ because they reminded him of the small rooms ________ lived in at the monastery
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ROBERT HOOKE• ________ ARE
THE BASIC UNITS OF ALL LIVING THINGS!!!
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Matthias Schleiden• Matthias
Schleiden is a German scientist who studied ________
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Matthias Schleiden• He concluded that
______________________________
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Theodor Schwann• Theodor
Schwann is a German scientist who studied __________
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Theodor Schwann• He concluded that
______________________________
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CELL THEORY• The CELL THEORY is made up of ___ parts.
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CELL THEORY• 1) All organisms are composed of one or
more cells.
• 2) The cell is the basic unit of structure and organization of organisms.
• 3) All cells come from pre-existing cells.
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Anton van Leeuwenhoek• Leeuwenhoek lived at the
same time as Robert Hooke, (1600’s) and used a simple light microscope to view object.
• Over the next 200 years, scientists improve microscopes and develop a compound light microscope.– Which uses a series of
lenses to magnify objects up to 1500X.
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Electron Microscopes
• First used in the 1930’s & 1940’s
• Uses a beam of electrons to magnify up to 500,000X
• Structures within cells can be seen
• Specimens must be examined in a vacuum
• Two basic types:– Scanning (SEM)– Transmission (TEM))
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How an Electron Microscope Works
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Image of a hydrothermal worm taken with an Electron Microscope
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A single Carbon atom
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1. Eyepiece
2. Body tube
3. Coarse Adjustment
4. Fine Adjustment
5. Arm
6. Base
7. Light Source
8. Diaphram
9. Stage
10. Stage clip
11. Low power objective
12. High power objective