[Cytologic features of rat liver growth in the embryonal and neonatal periods and during regeneration].

August rats were used for experiments. The growth of intact embryonal and neonatal liver was compared with the growth of adult regenerating liver at the early periods after partial hepatectomy (22, 48 and 78 hours after resection of 2/3 of the liver). Mitotic activity and the area of hepatocyte nuclei were determined; binucleated cells were counted. There proved to be a number of general regularities in the dynamics of the cytological parameters of growth for the intact embryonal, neonatal and regenerating adult liver of rats at the early periods after the resection.