Low oxygen content in the blood
The absence of RH (Rhesus factor) antigen on the red blood cells
Type O blood with a low concentration of white blood cells
Type O blood with a high concentration of hemoglobin.
The OAB blood group nomenclature includes the Rh system, important for blood transfusion, there are six types of Rh antigens, the D antigen is the most common in the population, which is why people who have it are called Rh positive and those without Rh negative, allowing specific applications.
