Any human has its rationality, this is the result of human evolution since ten million, blood type is no exception.

Once upon a time, although there are a lot of people have realized the importance of blood to the human life, but he didn't know
Kind of blood type and don't.As a result, there was a lot of the tragedy of death due to blood transfusion.Medical mystery until l900 years, blood type was at the university of Vienna, Austria, a rand steiner uncovered by pathologist.

Rand steiner from the experimental results of different serum and erythrocyte of condensation reaction between internal rule: each person's serum and meet their red blood cells, will not happen together;And different human red blood cells and serum mixed of different people, it could be condensed or not two completely different results.Accordingly, rand steiner boldly proclaim: there are three kinds of human blood types.He thinks that different type of red blood cells and serum mixed condensation reaction, is the secret of deadly blood transfusion reaction.Because blood mixed with a different blood type does not happen, so just to blood transfusion, among people with a different blood type will not lead to deadly blood transfusion reaction.Since then, the clinical blood transfusion just embarked on a track of science, human blood to an ambulance immeasurable role of life.

In 1902, rand steiner students DE kass johndroe for repeated rand steiner l55 a normal serum and Red Cross agglutination test, the results show that in addition to the three kinds of blood type rand steiner report, also there is a fourth type, this kind of blood type were ignored by the rand steiner.The fourth type of red blood cells, in addition to meet their serum without condensation, serum have taken place in the condensed, for others it is AB blood type.

In 1907 the Czech doctors Karl jansky sums up the relationship of these four type, promote the scientific development of blood transfusion.Later in order to avoid confusion, the naming and international unification of 4 kinds of blood type, named respectively as O, type A, type B, type AB.

In 1927, rand steiner immunologists Philip levine jointly with the United States found M, N and P factors in blood, promote the development of MNSS blood group system.

Rh is Rhesus monkeys (Rhesus Macacus)The English nameAccording to the first two letters.In 1940, rand steiner and British physician wiener when doing animal experiments, found the rhesus monkeys and most human red blood cells of the existence of Rh blood group antigen material, so to be named.Successful human blood red blood cells with Rh antigen (also called D antigen), called Rh negative, thus more scientific and complete explains some lose many times with blood type and hemolysis disease problem.It makes red blood cells have been found A, B, and AB O four main blood types, and were divided into Rh positive and negative two kinds.

Now scientists already know 270 accepted blood group antigen.Most of these antigens are classified in 29 blood type in the system, but the most important still is ABO and Rh system two kinds of blood type.In our country, Rh system is another important blood types after ABO blood group system.The han nationality in our country and Rh positive for most of the ethnic minority population accounts for more than 99%, so in general less rhinoplasties out problems in clinical blood transfusion.But in some ethnic minority population, Rh negative people more.

The evolution of the blood

University of gottingen, Germany mathematical statistics famous researchers blood type F.Professor bell, said: "the original period of the great apesType O blood, then all of A sudden variation for both A and B, with the passage of time, the original only split type O blood type A and type B ".The combination of type A and type B to produce new type O, type A, type B, and AB.

MuShunYing in 1980 unearthed a female mummy, generally called "loulan beauty", about 6000 years of history, science and determination of the women's blood type is O.Determine the remains of the ancient people of blood type, for studying the evolution of human society has an immeasurable role.

Human blood type evolution is divided into three periods.One is type O, roughly primitive society (ancient);2 it is type A, type B, roughly slave society (ancient);Three is O, type A, type B, type AB, roughly () of the middle ages of feudal society.

In general, O earlier period is over, time will advance the emergence of a new civilization.As the first man in Africa and the americas, Oceania O period especially long in some countries, such as from them out of the human in the far east and the north had ended O, type A and type B, A new civilization.Is likely to be affected by geographical environment, the indigenous inhabitants of stay in the original residence around the year two thousand than any other region of the people of late, finally ended with blood type O;Type O people with type O period without type A and type B split synthesis, is primitive, their intelligence, ability and modern type O person never the same.Modern primitive conservative degree is quite amazing, if not, combined with modern people to produce a new generation of light by natural changes it will quite a long time, they will not be easily dissolve in modern society.

Type A and type B is sharply divided between period, type B indiscriminate treatment of things like tools, livestock, people to think about the cruel, type A particular custom formed guarded difference system was very full.

Into the middle ages, in general, is a product of human blood group system perfect, philosophy and literature in this period there will be a big leap.This is the human blood type evolution law of co-occurrence effects on human thought.