Stem Cells in Medicine

Why are stem cells so fascinating? Besides their capacity for unlimited lifespan, one feature that makes stem cells desirable to medicine is a unique ability to repopulate and potentially restore defective tissues and organs. Following injury, cells in the body migrate to replace and fill up the damaged area. Albeit the human body cannot regrow a lost arm or leg. Given that there are animals whose limbs can regrow, such capabilities have likely been lost during evolution. There are two main types of stem cells: embryonic and adult stem cells