What are adult stem cells and from where do they come?
Fortunately, embryos are not the only source of stem cells. Adult stem cells are found in the individual at any time after birth. There are a number of ethical sources of stem cells that hold out realistic hope for cures and treatments of diseases. Stem cells from adult tissues, which are committed to differentiating into a limited number of cell types such as liver, brain or blood, are called adult stem cells. These too have the capability of developing into specific tissues. Adult-type stem cells can also be derived from various pregnancy-related sources such as umbilical cords, placentas and amniotic fluid. Some scientists today assert that not only are adult stem cells more readily available but they are also more effective in treating diseases. Which of the types of stem cells are medically most successful? Stem cells derived from placental or umbilical cord blood have proven to be remarkably effective, similar to other adult stem cells. Originally it was theorized that stem cells
