model-model sepatu converse batik Blood is blood from an individual classification based on presence or absence of substances on the surface of antigen-heritage red blood cell membrane. That’s because a difference types of carbohydrates and proteins on the surface of the red blood cell membrane. Two types of blood are the most important classification is the classification of the ABO and Rhesus (Rh factor). In this world are actually around 46 types of antigens other than ABO and Rh antigens, only more rarely found. Blood transfusion from an incompatible groups can cause transfusion reactions that result in anemia imunologis hemolysis, renal failure, shock, and death.
Human blood group is determined by the type of antigen and antibodies contained in the blood, as follows:
Individuals with blood type A have red blood cells with antigen A on the surface of cell membranes and produce antibodies against the B antigen in blood serum. As a result, people with blood type A-negative can only receive blood from a person with blood type A-negative or O-negative.
Individuals with blood type B has B antigens on the surface of red blood cells and produce antibodies against antigen A in blood serum. As a result, people with blood type B-negative blood can only receive blood from people with dolongan B-negative or O-negative
Individuals with blood type AB have red blood cells with antigen A and B and do not produce antibodies against antigens A or B. As a result, people with AB-positive blood type can receive blood from a person with any ABO blood group and called universal recipients. However, people with blood type AB-positive blood can not be donated unless in each AB-positive.
Individuals with blood type O have blood cells without antigen, but produce antibodies against antigens A and B. As a result, people with blood type O-negative blood can be donated to people with any ABO blood group and is called the universal donor. However, people with blood type O-negative can only receive blood from another O-negative.
In general, blood type O is the most common found in the world, although in some countries such as Sweden and Norway, blood group A more dominant. A more common antigens found than antigen B. Because blood type AB requires the presence of two antigens, A and B, the blood is the most rare type found in the world.
Austrian scientist Karl Landsteiner, achieved the Nobel Prize in Physiology and Medicine in 1930 for his services to find a way to ABO blood classification.