Type A blood is one of the four main blood types in the ABO blood group system. It is characterized by the presence of A antigens on the surface of red blood cells. People with Type A blood can receive blood from Type A and Type O donors, making it important for blood transfusions. Individuals with Type A blood can have either Rh-positive or Rh-negative blood, depending on the presence of the Rh factor. This blood type is common in many populations, and understanding blood types is crucial for safe medical procedures, such as organ transplants and surgeries involving blood loss.