Human only four blood types
Many people believe that humans only A, B, O and AB (hereinafter referred to as the ABO blood group) the four kinds of blood.In fact human blood type is very complex, in addition to the identical twins, in the world, almost no two people are the same blood type.Experts after calculation, concluded in one million population only eight people's blood type is similar.We usually say ABO blood group, but human red blood cells, blood type the type of the most common and important in the system.It has a simple and practical advantages, to paraphrase is also the most widely.
　　
Blood type is only used for blood transfusion
Some people only know the ABO blood group, and that only need to measure blood transfusion.In fact, the human form about blood type is quite widespread, in addition to blood transfusion, but also in confirm the blood relationship, investigation, diagnosis, genetic disorders and organ transplantation when applied.Such as blood type (HLA) is determined by genetics, thus can be used for identification of parent-child relationships, etc.
　　
Blood type is constant
Most people think of blood type a lifetime unchanged.It is true that in the general case, the person's blood type is produced when the fertilized egg form, keep to the end of life without change.But in recent years the medical study found that in some special cases, the person's blood type and temporal variation happens.Some intestinal malignant tumors, such as leukemia, patients with aplastic anemia and other disease, or radiation therapy, temporary variable blood type can be changed, but when the symptoms or stop after radiation therapy, can restore the original type again.
　　
Blood type judgment intelligence and personality
At present, many people take some some irresponsible in newspapers and magazines, propaganda of don't respect science, talk about a type intelligent, a type and lively, some kind of blood type a long time.According to this, people in the world is only the simple several types, so no scientific basis for these claims.Although human blood groups depending on their parents, but is not the father or the mother of a party but decided between the two sides, as a result, the vast majority of children's blood type and their parents may not have the same blood type.Only when a couple both blood type is O, their children's blood type can certainly consistent with parents, and O.However, personality, intelligence is not decided by genetic factors.