Some facts about blood and its properties. The rarest blood type

Blood since ancient times aroused great interest of mankind, or rather its composition and properties. She was credited with many mystical signs. In ancient times it was considered a source of divine energy and endowed with the ability to make the land more fertile. Even in our time, in the rites of some religions, wine is used that embodies the blood of Christ. What, in fact, are its properties?

The proportion of this component in the adult human body is about 6-8 percent of the body as a whole. In children this figure is even higher, 8-9 percent. Blood constantly circulates throughout the body and all organs.

There are the main four blood groups. Among them there are those that occur quite often, but one of them is a rare blood group. This sign is unchanged throughout the life path of man. What is this and what is the rarest blood group, we will consider further.

The division of blood into groups using the "ABO" system and division using the "rhesus" system is considered to be traditional. As you know, there are four main groups. The first group - I (0), is considered the most common. Its carriers are about 45 percent of all inhabitants of the planet. The second II (A) also occurs quite often, in 35 percent of the inhabitants of the Earth, mostly Europeans. Less common is the third group III (B). Only 13 percent of the world's inhabitants have it. Very rare blood group, the last, the fourth IV (AB). Its carriers are only 7 percent of the world's population. She is considered the youngest.

There are several hypotheses regarding the appearance of the fourth blood group. One of the versions of its appearance is connected with the epidemics that raged on the planet in the last 500 years. As a result, the evolution of the blood occurred, and as a result, this species appeared.

According to another version, this rare blood group occurred as a result of mixing of two races - black and yellow. Such marriages are rare, and accordingly this species is very rare.

Well, the third version of the appearance of the fourth version of the blood was the version about the changing nature of people's nutrition. Meat was used for food, which is subjected to a longer heat treatment. Many products of artificial origin have appeared. However, to the end of this issue scientists have not yet been studied.

The blood group in many ways affects the human body. It is believed that its character also depends on it. In addition, there are special diets that are selected and appointed depending on this factor.

Also, the dependence of the predominance of a certain group on race and nationality was revealed. So, among Europeans the second blood group dominates . Residents of the East in their majority are the owners of the third. Among the representatives of the Negroid race is predominantly the first group. However, for all inhabitants of the Earth a rare group of blood is the fourth.

It is assumed that the predominance in a particular region of the planet of one of the groups was influenced by the diseases that raged there. For example, plague and smallpox mostly affected people with the first group. Thus, there was a natural selection among Europeans.

In Japan, a study was conducted and the dependence of the nature of people on their blood group was revealed. It is also known that marriage between representatives of different genotypes is undesirable. The genotype, which is resistant to a particular race, is destroyed as a result of a mixed marriage. The child gets a new complex of genes, unstable to biological factors, and the number of hereditary diseases increases significantly.

Perhaps you have learned a lot for yourself: For example, what kind of blood group is rare and what is it related to. But the blood and its properties have not been studied yet, and much remains a mystery.