When a baby is conceived, stem cells give rise to every cell and tissue in the body. These cells then remain within the body throughout a lifetime. Stem cells are the basic building blocks of human tissue and have the ability to repair, rebuild, and rejuvenate tissues in the body. When a disease or injury strikes, stem cells respond to specific signals and set about to facilitate the healing process by differentiating into specialized cells required for the body’s repair. They release healing growth factors in response to a distress cell signal in an injured or pathologic area of the body.