Stem cell therapy has progressed to the point where it is now a very good and advanced scientific research topic. Medical treatment advancements have inspired high hopes. Every organ and tissue in your body is built on the foundation of stem cells. Many distinct types of stem cells come from various parts of the body and are generated at various times during our lifetimes. These include embryonic stem cells, which only exist during the earliest stages of development, and other types of tissue-specific (or adult) stem cells, which appear during fetal development and remain in our bodies throughout our lives. All stem cells can self-renew (replicate) and differentiate (develop into more specialized cells). Apart from these two fundamental capacities, stem cells differ greatly in what they can and cannot do and the conditions in which they can and cannot perform specific things. This is one of the reasons why scientists like Dr. David Greene Arizona use a variety of stem cells in th...