????? ??? ?? ??? ?? ? ??? ?????. ??? ??? ???? ??? ???, ??? ?? ??? ??? ? ??? ??? ????. ?? ??! ??? ?? ?? ???? ??? ???? ^^ ??? ??? ???? ?? ?! ???? ???? ? ??? ???. ?? ??? ??? ? ??? ??? ??? ??? ???! ?? ? ?? ???? ???? ???? ???! ?? ????? ??? ?????? ??? ???? ?? ?? ?????. ? ??????? ??? ????? ?? ????

????? ?? ???? ? ?? ?? ? ???? ?? ?? ??? ???? ?? ???????. ????? ?????? ?? ??? ??? ??? ?? ??? ?? ? ?? ?? ?? ????? ????? ??? ??? ??? ? ??? ???? ??? ???.  ??????? ?? ? ?? ? ???? ?? ?????. ???? ?? ????! ??????, ????? ???, ??? ???? ??? ???? ???. ? ?? ??? ?-??? ?? ??? ??? ??? ??? ??? ???? ?? ?

stem cell, an undifferentiated cell which can divide to provide some offspring cells that continue as stem cells and several cells that are destined to differentiate (grow to be specialised). Stem cells are an ongoing supply of the differentiated cells which make up the tissues and organs of animals

??? ? ?? ??????? ?? ??? ?? ???? ???? ??? ? ???? ???. ?? ??? ??? ?? ???? ??? ?? ???????. ???? ??? ??? ???? ???? ???? ?? ???? ???? ???? ? ?? ???? ?? ??? ??, ?? ???? ????? ???? ??? ?? ???? ???? ?? ????? ????. ????? ??????? ????? ????????? ?????? ????? ???????? ?? ?? ????? ??????? ?? ????. ?? ?

????? ???? ?????? ?? ? ?? ?? ?? ? ???, ??? ??? ??? ???? ?? ??? ?? ????. - ??? ?? ?? ??: ??? ???? ??? ? ?? ??? ?? ??? ???? ?? ??? ????????. ??? ??? ?? ??? ?????? ??? ??? ???? ???? ????. ? ? ??? ? ????. ??? ?? ??? ??? ???????, ??? ??? ????? ??? ??????, ??? ?? ??? ??? ???????