Electron microscopic studies of liver embryogenesis in humans II.

The hematopoietic cells.

Abstract

The ultrastructural changes of the erythropoietic cells in the fetal liver were studied electron microscopically, and these changas were tried to correlate with the cytochemicrl studies on erythrocytic development.
Incorporation into the eythropoietic cells of ferritin particles by rhopheocytosis (micropinocytosis)was observed in detail. The ultrastructure of the thrombopoietic cells was also clescribed. Inturelationships of the parenchymal -cells with mesenchymal hematopoietic cells were studied and discussed.