Abstract: Differentiation of embryonic cells

\nThe most important concept in by the data-based fertilized egglogy - the concept dissimilariation and de boundination, reflecting the basic phenomena of continuity, concord of discipline processes of the body. In ontogenesis infinitely occur processes of contrastingiation, that is, in that respect are immature and new victimisations betwixt the several(predicate) part of the embryo, in the midst of the cubicles and tissues, there are antithetical bodies. Compared with the initial training of the egg in the body seems remarkably difficult. Differentiation - it is structural, biochemical or former(a) modification of raisement of the organism, where a comparatively homogeneous is seemly an increasingly distinct, whether its cellular telephones (cytological dmferentsiatsiya), tissue (histological differentiation) or variety meat and body and in general, refers to the morphological or about physiologic changes. Us to site the mechanism of different differentiat ions use the term determination. Determinatsirovannoy is the part of the embryo from the moment when she carries the precise reasons for its further development when it can develop by samodifferentsirovke in accordance with its prospective development. According to BI Balinskii determination should be called a lull start to the processes of differentiation, their aspiration to develop in the intended direction, contempt the changing conditions, and the irreversibility of knightly changes.\nThe animals body is constructed from a relatively elflike human action of cell types legkorazlichimyh - of about 200. Differences between them so gain ground because, in profit to numerous proteins necessitate any cell of the body, different types of cells compound their own commit spetsializirovnnyh proteins. In epidermal cells formed kerotin in erythrocytes - hemoglobin in the intestinal cells - digestive enzymes, etc. The motility may farm whether it is non explained alone by t he point that the cells have different sets of genes? Lens cells could, for example, keratin genes lose hemoglobin, etc., just now retain crystallin genes, or they could be selectively increase the enactment of copies by aplifikatsy crystallin genes. However, this is non the case, a number of studies show that the cells of most all types see the same stark(a) genome, which was in the fertilized egg. Presumably, different cells are not because they contain different genes, and because they express different genes. Gene natural action is subject to enactment: they can be turned off.