what is the importance of electron microscope in study of the cell?
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extremely detailed images of cell surfaces by bombarding them with electrons and recording how they bounce back to put it simply.
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the scanning electron microscope, or sem, produces images by detecting secondary electrons which are emitted from the surface due to excitation by the primary electron beam. it is usually used to study topography such as 3-dimensional images. although it can also yield some information on morphology, crystallographic information and compositional information.\n\nwhile in the transmission electron microscope, or tem, the electrons are detected by beam transmission. it is usually used to study morphology and crystallographic information, even compositional information if so equipped.
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electron microscope works by passing a beam of electrons through specimen, it's much powerful than a light microscope that passes a beam of light through the specimen. with the light microscope you can even study live specimen, which is impossible with the electron microscope.
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The cytoplasm containing the other cell parts.
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The most obvious (or unobvious) is the centriole found in some nuclei.\n\nMany cells also have ribosomes and vesicles which might be hard to see except under the highest powers.\n\nThe Golgi are also exceedingly small and difficult to see.
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The reason plasm exisits in all living things is because all living things are made up of cells, which have organelles (eukaryotic cells) and these organelles are suspended in an plasma such as cytoplasm. Without plasma these organelles would not be able to survive and function and therefore the cell would die and therefore the organism (animal) would die.
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Molecular Biology of the Cell
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The first thing you will see is the structure of the cells which form tissue. Inside the cell, there's nuclues which contols all the activities in the cell. Protoplasm stands for cytoplasm and nuclues(extra info).
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SEM scans the surface of the object while in TEM the beam passes through the object\nTEM also have higher resolution
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organelle is a microscopic component of a cell...whereas a structure is refered to a cell..a whole cell and it's components
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If you mean the electron microscope (and I think you do, since optical microscopes can't magnify to that, er, magnitude):\n\n"The first electron microscope was built by the German physicist Ernst Ruska, who was awarded the Nobel Prize in 1986 for its invention. He knew that electrons possess a wave aspect, so he believed he could treat them in a fashion similar to light waves. Ruska was also aware that magnetic fields could manipulate electrons, possibly focusing them as optical lenses do to light. After confirming these principles through research, he set out to design an electron microscope. Ruska had deduced that an electron microscope would be much more powerful than an ordinary optical microscope, because he knew that magnification increased with shorter wavelengths. Since electron waves were shorter than ordinary light waves, it followed that they would allow for greater magnification. In 1932 Ruska and a collaborator, German physicist Max Knoll, under whom he obtained his doctorate, built the first crude electron microscope. Despite the fact that it was primitive and not fit for practical use, the instrument was still capable of magnifying objects 400 times.\n\nThe first practical electron microscope was built by Eli Franklin Burton and students at the University of Toronto, Canada in 1938.\n\nAlthough modern electron microscopes can magnify an object 2 million times, they are still based upon Ruska's prototype and his correlation between wavelength and magnification. The electron microscope is an integral part of many laboratories. Researchers use it to examine biological materials (such as microorganisms and cells), a variety of large molecules, medical biopsy samples, metals and crystalline structures, and the characteristics of various surfaces."
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it is very vital because if you need to look at a organism specially in biology you would be able to see it and study it
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It is the simplest form of a cell membrane. Actually the cell on contain es the cell membrane and nothing else. It is used for research when doing tests on a cell membrane. It has nothing that could interfere with normals.
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Here are just a few:\n\nSimple light\nCompound light\nDisecting light\nConfocal\nScanning electron\nTransmission electron\n\nI'm sure you could do a Google search on "microscopes" and find what you're looking for.
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Cells are usually not flat.  They are flattened when we prepare them for optical microscope slides.  There have been plenty of electron microscope pictures of various cells from the human body -- a good example would be the donut-shaped red blood cell, which is definitely not flat.
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Microbiologists use instruments that either observe cells in and out of culture or are used to examine at various levels of the internal structure of cells.  Here is a partial list\n\npH meter\n\nmicroscopes of various kinds\nregular optical\nconfocal\ndual photon\nphase contrast\n\nspectrometers\ninfrared\nUV - VIS\nNMR/MRI\nX ray, scanning electron microscope\n\nprobe microscopes\ntunneling electron microscope\n\natomic force microscopes\n\ncell counters\ncell separators/sorters\n\nelectrophoresis\nSDS-PAGE\nNorthern blot\nWestern blot\n\ncentrifuges\nslower speeds separate cells and larger cell structures\nhigher speeds separate internal parts and smaller cell structures\n\nchromatography/chromatographs\nliquid-liquid with spectrometer attached\nliquid-solid with spectrometer attached\nfractionators attached before or after spectrometers\n\ncomputers\ngathering data and for simulations\ninformatics\nmodeling\n\nradiation counters, usually for beta emitters\nscintillation
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Try this:\nhttp://en.wikipedia.org/wiki/Cell_(biology)\n\nhttp://health-pictures.com/images/Human-cell.jpg