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Cytology and the Microscope

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Presentation on theme: "Cytology and the Microscope"— Presentation transcript:

1 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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3 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.

4 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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7 Eukaryote (light microscope)

8 Plant Cell (light microscope)

9 Nucleus and Nucleolus

10 Rough E.R.

11 Vesicles

12 Microvilli

13 Eukaryote (animal)

14 Liver Cell

15 Eukaryote (plant)

16 Insect Eye

17 Mite

18 Mosquito Antenna

19 Axon from Neuron

20 Prokaryote (E. Coli)

21 Bacillus Bacteria

22 Bacteriophage

23 Bacteriophage 2

24 Bee Parasite

25 Insect Parasite Emerging

26 Butterfly Wing

27 Crystalline DNA

28 Ebola Virus


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