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 .
C0005953
bone marrow
C0229613
lymphoblasts