The presence of stem cells in fact own particular function within health system. These days, medical practitioners have already been aware to use it for restoring the wrecked cells that happen in human body, it is all done to protect the living process of people. When the stem cells are differentiated, the newest cells may keep staying as the steam cells or turn out to be the other dissimilar cells with extraordinary function, such as these stem cells can restore the function of thrombosis cells, muscle cells, brain cells and liver cells. Whole stem cells, in the point of fact, own two imperative characteristics, which are absolutely different than the others. The first stem cells may have not been said as the cells with special role but those cells can be able to build up itself through the differentiation ways, even when these cells are inactive in very long time. The second one is, these cells can be planted into some special cells with other roles, such as tissue cells and also organ cells that have its roles. These beneficial cells nowadays are kept in special place named Cord Blood Bank, in cord blood and spinal cord, these stem cells will regularly develop and repair  the broken tissues. In liver and pancreas, the development merely happens in certain situation.