What are stem cells?

Stem cells are special types of cells that have the unique ability to develop into many different cell types in the body. They can divide and renew themselves for long periods, making them essential for growth, healing, and replacing damaged tissues. There are two main types: embryonic stem cells, which can become any cell type, and adult stem cells, which are more limited in what they can become. Stem cells are widely used in medical research and have potential applications in treating diseases like leukemia, diabetes, and spinal cord injuries.