Tissue Culture of the Bone Marrow in Various Animals Part 2.Carbon-Particle Phagocytosis of Bone Marrow Cells

With bone-marrow tissue culture of such various animals as mammals (mice, albino rats, guinea pigs, cats and dogs), birds (chicken and pigeons) and cold blooded animis (frogs), the author studied the phagocytosis of carbon particles by bone-marrow cells and obtained the following conclusions. 1) In the neutrophilic series myeloblasts, promyelocytes and myelocytes show no phagocytic power. Metamyelocytes of mammals show a sligh phagocytic capacily; but it is wanting in the species lower than birds. On the other hand, mature neutrophils show a considerable phagocytic power. 2) Eosinophils, basophilocytes and lymphocytes have no phagocytic capacity nor megakaryocytes, but thrombocytes possess adhesive and phagocytic abilities. A slight ingestion of carbon particles by spindle cells can be observed in the species lower than birds. 3) Comparing the average rate of phagocytosis of mature neutophils, it is generally higher in mammals, followed by that of frogs, and it is lowest in pseudo-eosinophils of birds. 4) The phagocytic ability of monocytes increases along with the lapse of time, surpassing that of neutrophils, and it does not decrease even with the passing of time. Moreover, the average rate of phagocytosis of monoytes shows no significant difference among various animals as observable in the case of neutrophils