[Reaction of various components of the erythrocyte system to periodic action of submaximal loads].

During repeated exposures of rats to hypergravity two stages of catabolic and adaptive developments in red blood were distinguished. The first stage that lasted about a week was characterized by decrease of resistance and hemolysis of red blood cells, hemosiderosis in the spleen, circulation hypoxia in the liver. The second stage was characterized by the predominance of adaptive processes, viz. increased activity of red blood cells, enhanced erythropoiesis in the spleen pulp, and appearance of highly active hepatocytes.