A blood bank is a specialized facility that collects, tests, processes, stores, and distributes blood and its components for transfusion. It plays a critical role in healthcare by ensuring a safe and sufficient supply of blood for patients in need, such as those undergoing surgery, suffering from trauma, or managing chronic illnesses. Blood banks adhere to strict regulatory standards to maintain the safety and quality of blood products, conducting thorough testing to screen for infectious diseases and ensuring compatibility for transfusions. Additionally, they engage in community outreach to encourage voluntary blood donations, helping to maintain an adequate blood supply.