How can you determine the blood group? Detailed answer

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How can you determine the blood group? Detailed answer

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How can you determine the blood type?

It is hard to believe that the blood of people is not the same, and for a long time science did not know this. They performed a blood transfusion from one person to another, completely unaware that it differs by groups. It turned out, however, that in about half of the cases, instead of the expected improvement, the patient became worse, and he often died.

So, research began, and as a result, the existence of different blood types was discovered. Here's what happens when a drop of one type of blood enters the blood or serum of another, foreign to it: blood cells begin to cluster. This phenomenon is known as "agglutination" or "clumping".

Agglutination is usually followed by destruction of blood cells, which is why blood typing is so important. Using agglutination tests, it was found that human blood can be divided into four groups: O, A, B, AB.

Group O blood cells do not stick together with the serum of any of the other groups. In other words, type O blood can be transfused to any person. People with blood type O are considered "universal donors". Group AB serum does not stick to other cells, so people with this blood type can accept any other.

Each person inherits a certain blood type, and it never changes. An interesting observation has been made regarding blood types: there is a certain pattern of their distribution around the world! If you drive from west to east, the percentage of people with blood type A decreases, while those with blood type B increase. In England, 43 percent of people belong to group A, in Russia - 30 percent, and in India - only 15. As for group B, the opposite is true. At the same time, there seems to be no connection between your blood type and whether you are healthy or sick.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Whom did the ancient Greeks consider to be the progenitors of modern mankind?

When Zeus, angry with the people of the Copper Age, decided to destroy all life and sent a flood to the earth, the only righteous people who were allowed to escape were Deucalion, the son of Prometheus and the oceanides Clymene, and his wife Pyrrha, the daughter of Epimetheus and Pandora. Deucalion, on the advice of Prometheus, built an ark in the form of a large box, on which he and Pyrrha escaped during the nine-day flood that destroyed mankind. On the tenth day, the water began to subside and the ark landed on Mount Parnassus, or, as some believe, Mount Etna.

It is also said that Deucalion was informed of the appearance of the earth by a dove released by him. Having descended safely to earth and made sacrifices to Zeus, Deucalion received advice from him on how to revive the human race (according to another version, Themis gave advice). Having wrapped their heads and loosened their belts, Deucalion and Pyrrha were supposed to throw the "bones of the mother" over their heads. Since Deucalion and Pyrrha had different mothers and both had already died by that time, they decided that the deity meant the earth, the universal mother of people, whose bones are stones lying on the river bank. Deucalion and Pyrrha carried out the order.

From the stones thrown by Deucalion, men appeared, from the stones of Pyrrha - women. Deucalion and Pyrrha also had children, among them Amphictyon, famous for entertaining Dionysus and being the first to mix water and wine. However, their eldest son Ellin, the founder of the Greek tribes, is most famous.

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