Changes in the structure and cell composition of the thymus as a result of dosed physical loads

By means of histological and morphometrical methods normal age involution of the thymus has been studied, as well as its changes under conditions of dosed physical loadings. The experiment has been performed in 92 non-inbred white male rats. At adaptation of the organism to the loadings, involution of the gland decelerates, and at an insufficient adaptation--accelerates. This is, probably, the cause of decreasing protective forces of the organism.