How many blood types are there in people, and what are the blood types of people?

We have 4 blood types – O, A, B and AB.

Blood type O has the longest history. It appeared around 60,000 to 40,000 B.C., when Neanderthals ate a simple diet: weeds, insects, and predators that fell from trees ate the leftover fruit.

And 40,000 years ago, the Cromanon people appeared, and they lived by hunting. After hunting all the big beasts, they moved from Africa to Europe and Asia.

Blood type A appeared between 10,000 and 10,000 BC. At that time, our fruit-based ancestors gradually became omnivorous. Over time, farming became the main mode of production for the people living in present-day Europe, wild birds and beasts began to be domesticated, and the diet of people changed.

Even now, the vast majority of people with blood type A live in Western Europe and Japan.

Blood type B appeared between about 10,000 BC and the New Era. At that time, parts of East Africa were forced to migrate from the savanna steppes to the cold and barren Himalayas. Climate change is a major factor in the development of blood type B.

This blood type first appeared in the race, and as they continued to migrate to the European continent, many Eastern Europeans today share this blood type.

Four common blood types (aAB b O), and the panda blood group (rh has a yin and yang distinction), as well as compound blood types and other rare blood types.

How many blood types does a human have?

In a narrow sense, blood group refers specifically to the difference in red blood cell antigens between individuals; However, it is now known that in addition to red blood cells, there are antigenic differences between individuals in white blood cells, platelets, and even certain plasma proteins. Therefore, blood grouping in a broad sense should include the differences in antigens of each component of the blood between individuals. In fact, blood group has a wide range of practical value in anthropology, genetics, forensic science, clinical medicine and other disciplines, so it has important theoretical and practical significance, and at the same time, the discovery of animal blood group also provides new problems and research directions for blood group research.

Blood types are generally divided into four types: A, B, AB and O, and there are more than 10 very rare blood group systems such as Rh-negative blood group, MNSSU blood group, P blood type, AB blood type and D deficiency blood type.

Over the decades, new blood group systems have been reported, and the International Association for Blood Transfusion, founded in 1935, is responsible for identifying and naming them. The 30 recognized human blood group systems include more than 600 antigens, but most of them are very rare.

At present, the most commonly used blood group classification is ABO blood group and RH blood group. The ABO blood group classification refers to the blood group of red blood cells and is determined based on the antigen specificity on the surface of red blood cells. The main thing is to divide human blood groups into four types: A, B, AB, and O.

The RH blood group is divided into negative and positive. These two are closely related to blood transfusion and pregnancy. Blood type is determined by genetics, and the blood type relationship between parents and offspring depends on genetic factors.

If both parents are O-type, the parent is also O-type, and the parent is O-type or AB-type, then the offspring is A-type or B-type.

In daily life, ABO blood type is the first thing that most people think of, and it is also recognized and used by the World Health Organization to promote it to the world. Broadly speaking, there are four main types of blood types: A, B, AB, and O. To be precise, the two blood types A and AB can be subdivided into A1 and A2, as well as A1B and A2B.

These six blood types are suitable for most members of the population with different blood types. With the deepening of research, in addition to ABO blood group, the most widely used in life and medical treatment are RH blood group, HLA blood group, etc.

There are 4 types of human blood types: type A, type B, type O, and type A B.