[Morphofunctional status of the thymus in guinea pigs exposed to thymus and bone marrow preparations]

Study of the effect of the polypeptide thymic factor (thymalin) and the polypeptide bone marrow factor (hemalin) on the morphofunctional status of the thymus in guinea-pigs has shown that injection of thymalin into animals increases the count of small lymphocytes whereas injection of hemalin the count of medium-sized lymphocytes and lymphoblasts. Injection of thymalin magnifies the size of the nuclei of the reticuloendothelial cells.