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This is determined by two antigens on the red blood cells: The most important blood group system is ABO, in which your blood is classified as A, B, O or AB. The donor’s blood type is identified at the Blood Centre, and the patient’s blood type is determined before transfusion. As a result, blood type match is of critical importance. An antigen is a structure on the cell surface that causes a human immune response reacts to if the structure is foreign to the person’s body. Human blood type is determined by antigens on the red blood cells. Blood Pressure Explained Brewer's: Health Check Your Healthy Heart I.Q.If a doctor talks about your blood type, usually he or she is referring to two things: your type in the ABO system and Rhesus (Rh) factor. Or, if you're interested in other health subjects, you might be interested in our list of the top air purifiers. Many blood donation centers are run by the Red Cross. The American Association of Blood Banks maintains a database of locations for individuals to donate blood. According to the Centers for Disease Control, there are more than 9.5 million blood donors in the United States and an estimated 5 million patients who receive blood annually, resulting in a total of 14.6 million transfusions per year. Conversely, AB are rare blood types AB negative is the rarest.ĭonor blood is tested for HIV, hepatitis, syphilis, West Nile virus and other diseases before transfusion. Type O blood won't provoke a response from anti-a or anti-b antibodies. Luckily for the patients, group O is the most common blood type among the U.S. If someone receives the wrong blood, their immune system will kick in and produce antibodies to attack the new red cells. Matching the right types of blood is very important. Aside from transferring blood as a whole, parts of blood, such as red blood cells, platelets or plasma can also be transferred to individuals. Blood that is lost through an injury, an illness or a surgery can be replaced through transfusion. In Japan, the idea of blood type as personality type is so popular that Japanese ask "What's your blood type?" about as often as Americans ask "What's your sign?"Ī blood transfusion is the transfer of blood from one person to another.Legend has it that Type A is calm and trustworthy Type B is creative and excitable Type AB blood is thoughtful and emotional and Type O is a confident leader. Some people think blood type tells about personality.Dogs have 4 blood types cats have 11 cows have about 800. Different kinds of animals have different kinds of blood.In China, over 99 percent of the population has Rh+ blood. Certain blood types are more common in certain countries.Blood type is inherited, just like eye color.Individuals with Type AB positive blood are considered the universal recipients because people with that type can receive any blood type.īlood Type Chart: Below is a chart listing blood types, the percentage of Americans with that type, and the types they can donate to. People with Type O negative blood are considered to be universal donors because they can donate to people of any blood type. If the blood types are not compatible, red blood cells will clump together, making clots that can block blood vessels and cause death. During a blood transfusion, a patient must receive a blood type that is compatible with his or her own. Knowing a person's exact blood type is critical when a blood transfusion is necessary. The name Rhesus comes from Rhesus monkeys, in which the protein was first discovered. Rhesus refers to another type of antigen, or protein, on the surface of red blood cells. Blood is either Rh positive (Rh+) or Rh negative (Rh-). The Rh FactorĮach blood type is also grouped by its Rhesus factor, or Rh factor. For example, the surface of red blood cells in Type A blood has antigens known as A-antigens. Each letter refers to a kind of antigen, or protein, on the surface of red blood cells.
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Human blood is grouped into four types: A, B, AB, and O.