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Cytology and the Microscope
The branch of science/biology dealing with the study of cells and cell behavior; you need a microscope to perform cytology! Light Microscope: limited by the properties of visible light (wavelength) Electron Microscope: uses a beam of electrons which has a smaller wavelength than visible light Instead of glass lenses focusing the light in the light microscope, the TEM uses electromagnetic lenses to focus the electrons into a very thin beam. The electron beam then travels through the specimen you want to study.
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Two classes of E.M.: Scanning electron microscopes produce a 3D image of the exterior of a dead specimen Transmission E.M. deliver the best resolution of a thin slice of a prepared specimen. Both types are extremely expensive, cumbersome pieces of equipment.
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They both have extremely good resolution and are used extensively at universities, well equipped labs, and teaching hospitals. Resolution = the ability to distinguish between 2 objects that are very close together.
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Eukaryote (light microscope)
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Plant Cell (light microscope)
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Nucleus and Nucleolus
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Rough E.R.
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Vesicles
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Microvilli
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Eukaryote (animal)
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Liver Cell
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Eukaryote (plant)
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Insect Eye
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Mite
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Mosquito Antenna
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Axon from Neuron
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Prokaryote (E. Coli)
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Bacillus Bacteria
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Bacteriophage
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Bacteriophage 2
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Bee Parasite
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Insect Parasite Emerging
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Butterfly Wing
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Crystalline DNA
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Ebola Virus
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