Stem cells and its value

Stem cells were first discovered in the early part of the 20th century when scientists observed that certain cells could give rise to blood cells. Since then a lot of progress have been made. Three unique properties characterized the nature of stem cells:
First, stem cells have the unique capability to divide or self-replicate for a long period of time.
Second, they are unspecialized in the sense that they do not have the tissue-specific structure for performing specialized function.
Third, under the right physiological conditions, stem cells can develop into other cell types which make up the living organism.
In other words, stem cells carry the intrinsic potential to develop into a variety of cells for specialized functions, for example, cells in the heart tissue, or the nerve cells.