In the same way, if you have the B marker, your body makes A antibodies. Blood transfusions are one of the most frequent lifesaving procedures hospitals do. Every 2 seconds someone needs a blood transfusion. So there's always a need for blood donors. One blood donation can save up to three lives.
If you'd like to help, contact your community blood center. It's one way to be an everyday superhero and save lives! Reviewed by: Maureen F. Edelson, MD. Larger text size Large text size Regular text size.
What Are the Components of Blood? All blood contains the same basic components: red blood cells white blood cells platelets plasma But not everyone has the same blood type. What Are the Blood Types? The two main blood groups are ABO and Rh. Type B: This blood type has a marker known as B. Type O: This blood type has neither A or B markers. So, there are eight possible blood types: O negative.
This blood type doesn't have A or B markers, and it doesn't have Rh factor. O positive. This blood type doesn't have A or B markers, but it does have Rh factor. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.
Blood is made up of red blood cells, white blood cells and platelets in a liquid called plasma. Your blood group is identified by antibodies and antigens in the blood.
Antibodies are proteins found in plasma. They're part of your body's natural defences. They recognise foreign substances, such as germs, and alert your immune system, which destroys them. Blood group O is the most common blood group. Receiving blood from the wrong ABO group can be life-threatening. For example, if someone with group B blood is given group A blood, their anti-A antibodies will attack the group A cells. This is why group A blood must never be given to someone who has group B blood and vice versa.
As group O red blood cells do not have any A or B antigens, it can safely be given to any other group. Red blood cells sometimes have another antigen, a protein known as the RhD antigen. If this is present, your blood group is RhD positive. There are medical interventions that can be taken under the supervision of a physician to protect the baby in utero.
The Rh factor is important to determine in blood donations and transfusions. A person with the Rh positive factor will not make anti-Rh antibodies. Those with Rh negative factor will produce the antibodies.
Blood type and Rh factor screening are done not only to categorize a blood donation. The Rh screening test result also allows a healthcare provider to give additional support to a patient if incompatibility is detected. Do you know your Rh factor type? An Rh screening test is a procedure that determines whether the blood cells have the Rh protein on the surface of the blood cell.
This exam requires a healthcare professional to collect a sample of blood from a vein in the hand or arm to perform the test.
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