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Electron Microscopy and the study of the Cell.
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Electron Microscopy. Electron Microscopes have revolutionised today's understanding of the cell. In 1838 Scheleiden, a botanist theorised that the basic unit of a plant was a cell, the following year the scientist Schwann came up with a similar hypothesis this time related to animal cells, their combined ideas gave us the cell theory, the idea that all living things were made from similar building blocks, cells. It took 100 years before this idea was confirmed with the invention of the electron microscope. Prior to this light microscopes, which enable us to see large cells, were used; but their resolving power was not high enough to confirm that all living things were made from cells as the physics of a light microscope only enables it to magnify something by about 2000x, a resolution of about 0.2 micrometers. In this essay I will be discussing the uses of electron microscopes, the way...
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