Because in essence what it means is you can take a cell, which is a pluripotent stem cell, which is like a skier at the top of a mountain, and those two skiers become two pluripotent stem cells, four, eight, 16, and then it gets so crowded after 16 divisions that those cells have to differentiate.
Esencialisht merret nje qelize qe eshte nje qelize qe ndryshon qe duket si nje skiator ne maje te malit, dhe keta dy skiatore behen qeliza trungu 4,8,16 dhe behen aq shume sa qe pas 16 percarjeve ato qeliza duhet te ndryshojne.