An experimental study has been carried out aiming at determining and identifying endothelial cells-precursors in a suspension of human fetal liver of 8–10 gestation weeks. Using of morphological, electron microscopic, imunocytochemical methods and in vitro cultivation in the extracellular matrix we have proven the following: the primary suspension of human fetal liver cells contains endothelial line cells, which are capable to express the endothelial marker FLK-1 and to form capillary-like structures in vitro. The use of fetal liver cell cultures in treating pathological conditions accompanied by the ischemic syndrome is possible.
