Cytology Introduction to Cells. Magnification Resolution ~ 0.2 m in LM ~ 0.2 nm in EM Magnifying...
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Introduction to Cells
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Transcript of Cytology Introduction to Cells. Magnification Resolution ~ 0.2 m in LM ~ 0.2 nm in EM Magnifying...
MagnificationResolution
~ 0.2 mm in LM
~ 0.2 nm in EM
Magnifying Power~ 2,000x in LM
~ 2,000,000x in EM
Electron MicroscopesTransmission EM
Internal features
Scanning EMSurface features
EM DrawbacksExpense
B&W Images
Dead specimens
Why are cellsso small?
VolumeThe need to acquire nutrients and dispose of waste is the same with one large or many small cells.
Surface AreaThe ability to acquire nutrients and dispose of waste is six times greater w/ small cells.