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Cell Theory - Coggle Diagram
Cell Theory
scientists
Robert Hooke - British scientist
1665
First to discover the cell using a simple microscope
He saw rectangular, box-shaped structures using a cork
called cells: Cellulae (small rooms)
Lauwenhook - Dutch Scientist
late 1600's
He used to examine pond water, plaque of teeth, milk, etc
He then discovered that these structures contain living organisms
called the animalcules
Schliden- German botanist
1838
he discovered that plants are made of cells
Schwan- German zoologist
1839
discovered that animal tissue made up of cells
Virchow - German Pathologist
Discovered that cells dividing from pre-existing cells
cell theory principles
Come from pre-existing cells
Basic unit of life
All organisms have one or more cells
Electron Microscope
Scanning Microscope
Includes 3D image of the cell
only examine nonliving cells
Scanning Tunneling Microscope
Includes 3D image of ONLY SMALL CELLS
Examines living cells
Transmission Electron Microscope
Uses magnets to aim at beam of electrons to magnify image to 500,000x
Only examines nonliving organisms
Prokaryotic
No True Nucleus, No membrane bound organelles
Generally unicellular: bacteria
Smaller and Simpler
Eukaryotic
True nucleus and membrane bound organelles
Bigger and more complex
multicellular or unicellular
Compound Microscope
Uses Visible light and series of glass lenses to magnify
Magnify up to 1000x
All cells have a plasma membrane and some genetic material