1. Meanwhile, some stem cells from other organs, bone marrow stem cells for example, pass the liver through blood way and some of them turn into hepatocyte lineage cells and converge into the mainstream at different sites as affluents.
    而经由血流到达肝脏的过客性干细胞可不同程度地在不同区段作为该流域的支流汇入干流并转分化为肝系细胞。