Progenitor cells are stem cells that have begun the process of differentiation, meaning they have started to develop into specific types of cells. These cells have the ability to divide and differentiate into specialized cell types, making them valuable in regenerative medicine and tissue engineering. Progenitor cells are found in various tissues throughout the body and play a crucial role in maintaining and repairing damaged tissues. Researchers are studying progenitor cells to better understand their behavior, potential therapeutic applications, and how they can be harnessed for treating a range of diseases and injuries.