Adult stem cells are specialized cells found in various tissues of the body, such as bone marrow, skin, and the brain. Unlike embryonic stem cells, which can develop into any cell type, adult stem cells have a more limited ability to differentiate. They primarily serve to repair and maintain the tissues in which they reside. These cells play a crucial role in healing and regeneration. For example, hematopoietic stem cells in the bone marrow produce new blood cells, while mesenchymal stem cells can develop into bone, cartilage, and fat cells. Researchers are exploring their potential for treating various diseases and injuries.