What are stem cells?Stem cells are distinctive human cells that can develop into many varieties of cell types, from intestine cells to heart cells. In some manifestations, they also have the potential to repair damaged tissues.Importance of Stem Cells.Stem cells are crucial for living things for many purposes. In the 3-5 days old embryo, known as a blastocyst, the inner cells generate the whole body of the organism, which include all of the many specialized cell types and part of the body such