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Cell is the most basic component of life, cell research has been started from a long time ago, with the continuous progress of science and technology, cell research is more in-depth, so that people can have a deeper understanding of cells, the following Jinan Cell Engineering to introduce to you about cells and cell research development The history of the exhibition.（Living cells）
There is no uniform definition of cell, and it is generally said that cell is the basic structural and functional unit of organism. All organisms except viruses are known to be composed of cells, but viral activity must also be present in cells.
Generally speaking, most microorganisms such as bacteria and protozoa consist of one cell, i.e. unicellular organisms, while higher plants and higher animals are multicellular organisms. Cells can be divided into prokaryotic cells and eukaryotic cells, but it is also proposed that they should be divided into three categories, that is, the prokaryotic cells belong to the prokaryotic cells of the paleokaryotic cells as a separate side by side. The discipline of cell research is called cell biology.
The cells are tiny in shape and can be seen under microscope. It is mainly composed of nucleus and cytoplasm, with cell membrane on the surface. There are cell walls outside the cell membrane of higher plants, plastids in the cytoplasm, chloroplasts and vacuoles in the body, and mitochondria. There is no cell wall in animal cells. Centrosome is often found in cytoplasm, but not in higher plant cells. Cells have the functions of movement, nutrition and reproduction.
After 1830, with the development of industrial production, the fabrication of microscopes overcame the shortcomings of blurred lenses and chromatic aberration, and the resolution was increased to 1 micron, and microscopes began to become more and more popular. The cells and their inclusions were observed more clearly after the improved microscope. In 1839, German botanist Matthias Schleiden (1804-1881) concluded from observations of a large number of plants that all plants are composed of cells. Meanwhile, German zoologist Schwann has done a lot of research on animal cells. At that time, due to Hooker's influence, the observation of cells focused on cell walls rather than cell inclusions, so the understanding of animal cells without cell walls was much later than that of plant cells. Schwann has done a lot of research, the first one describing animal cells similar to plant cells.
Ten years after Schwann and Schleiden in Germany, scientists have discovered new evidence that cells divide from cells that already exist, and the cytology of the early 21st century can be summarized roughly as follows: cells are the structural units of all
organisms, cells are the physiological units of all organisms, cells are the cells. It comes from the cells that have already survived.
Cell research has never stopped, for the sake of people's happy life and for the sake of making people achieve important
achievements in the history of medicine, cell research will surely advance rapidly. If you want to know more about cells, please go to Lederbert (Beijing) Biotechnology Co., Ltd. for enquiries. We are always welcome to you. Come on.
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