Blood group system Identify Blood Group 🩸🩸 The ABO blood group system classifies human blood into four major groups based on the presence or absence of antigens called A and B on red blood cells. The four blood types are A, B, AB, and O. Additionally, individuals can be Rh-positive or Rh-negative, creating the eight main blood types. Blood type compatibility is crucial for blood transfusions and organ transplants.Blood grouping #pathology #medicalstudent #analysis #bloodbank #biology #labtech