In practice, stem cells are identified by whether they can regenerate tissue. For instance, the defining exam for bone marrow or hematopoietic stem cells (HSCs) is the ability to transplant the cells and preserve someone without HSCs.Nearly all investigation up to now has made utilization of mouse embryonic stem cells (mES) or human embryonic stem

???? ??? ???? ?? ????? ?? ?????. ??? ??? ??? ? ?? ???? ??? ?? ??? ??? ?? ????.#??? #????? #????? #????? #????? #?????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #?????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #????? #?????? #????? #????? #????? #????? #????? #????? #????

-?????? ???? ???? ??? ????? ???? ? ??? ????.?????: #?? #??? #??? #??? #???? #???? #????? #????? #?????? #?????#????????#????????#???????#???????#??????#??????#?????#??????#??????#????????#????????#????????#????????#????????#???????#???????#??????#??????#?????#??????#??????#????????#????????#???????????? ?? ?? ??? ??? ????? ???? ? ?? ??? ???? ??????

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

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