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     Cell is the structural and functional elementary unit of organisms including human being, Cell biology is a subject that study the structure and the law of vital activities of cell on cellular, sub-cellular and molecular level. Cell biology is one advanced and backbone subject of life sciences, which is the fundamental subject of both preclinic medicine and clinical medicine too. Now, cell biology has become the weightily fundamental subject of medical and the other university in the country, even in all the world. All the subject include four units, in the first unit the study contents, history and develop of the subject are related, for instance, who discover cell, and how did the theory of cell develop a subject; the second unit tell of the compositions, structure and function of cell, such as the compositions, structure and function of mitochondrion, plasma membrane, nucleus, and so on; the vital activities of cell will be talked about in the third unit, which include cell division, cell differentiation, caducity and death; in the last unit, the application of techniques of cell biology are described, for example, cell engineer and the application of stem cell.

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