![]() ![]() Depending on which blood type a person has, the immune system will make antibodies to react against other blood types. The immune system makes proteins called antibodies that act as protectors if foreign cells enter the body. If a match isn’t recognized, the cells are rejected. To get a blood transfusion safely, a person’s immune system must recognize the donor cells as a match to his or her own cells. It can identify antigens as self or nonself. The immune system is the body’s protection against invaders. It’s just a genetic difference, like having green eyes instead of blue or straight hair instead of curly. Having any of these markers (or none of them) doesn’t make a person’s blood any healthier or stronger. This blood type has all three types of markers - A, B, and Rh factor. This blood type has A and B markers, but not Rh factor. This blood type has B marker and Rh factor, but not A marker. Along with O positive, it’s one of the two most common blood types. This blood type has A marker and Rh factor, but not B marker. O positive blood is one of the two most common blood types (the other is A positive). This blood type doesn’t have A or B markers, but it does have Rh factor. This blood type doesn’t have A or B markers, and it doesn’t have Rh factor. So, there are eight possible blood types: Type O: This blood type has neither A or B markers.īlood is further classified as being either “Rh positive” (meaning it has Rh factor) or “Rh negative” (without Rh factor).Type AB: This blood type has both A and B markers.Type B: This blood type has a marker known as B.Type A: This blood type has a marker known as A.The ABO blood system has four main types: The two main blood groups are ABO and Rh. These markers (also called antigens) are proteins and sugars that our bodies use to identify the blood cells as belonging in us. Red blood cells have markers on their surface that characterize the cell type. What Are the Blood Types?Ĭategorizing blood according to type helps prevent reactions when someone gets a blood transfusion. ![]() What Are the Components of Blood?Īll blood contains the same basic components:īut not everyone has the same blood type. To keep the blood supply safe, every donation is tested for blood type and checked for infectious diseases. ![]() Blood transfusions are needed for many reasons, including surgery, after accidents, and for patients withīlood cannot be artificially made, so doctors rely on volunteer donations. Blood transfusions are a lifesaving treatment for many Americans. ![]()
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