Stem cells are unique cells in the body that have the ability to develop into many different cell types. They can divide and renew themselves for long periods, making them essential for growth, development, and healing. There are two main types of stem cells: embryonic stem cells, which come from early-stage embryos, and adult stem cells, which are found in various tissues throughout the body. Researchers study stem cells to understand their potential in treating diseases and injuries. For example, they may help regenerate damaged tissues in conditions like heart disease or diabetes. The ability to transform into specialized cells makes stem cells a promising area of medical research.