The ranking of the four major blood types is announced: the average age of blood type B is 78 years old, ranking second, which type is the first?

There are many human blood types. Each blood group system is genetically determined and has immune characteristics. In daily life, the most common blood type is the ABO blood type (divided into A, B, AB and O). Followed by the RH blood group system (mainly divided into RH positive and RH negative). Third, the MN and MNSS blood group systems.

The blood group system is a combination of classifications based on the relationship between identical (or phenotypic) antigens on the red blood cell membrane. Erythrocyte epitopes can cause allogeneic and xenogeneic immune responses. In human blood typing, specific human antisera are often used for coagulation reactions.

Each blood group system is inherited independently, and most of the genes that control the blood group system are on the same chromosome. Thirty-five human blood group systems have been identified, but the ABO blood group system and the RH blood group system have the most clinical significance in clinical trials.

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The ranking of the four major blood types is announced: the average age of blood type B is 78 years old, ranking second and first.

Fourth place: blood type A.

Generally speaking, the lifespan of blood type A is about 65 years. It is the fourth of the four main blood types. Type A blood is the most common blood type.

According to relevant research, the digestive system of blood type A is not very strong, and people with blood type A will have more cardiovascular and cerebrovascular problems after entering old age.

Therefore, it is recommended that patients with blood type A maintain good eating habits in daily life, avoid eating high-sugar, high-fat foods, and avoid poor blood vessel or blood viscosity.

Third place: AB blood type.

Blood type AB ranks third, with a life expectancy of about 70 years, so type AB blood is very rare, probably only accounting for about 9% of the global population.

People with this blood type are more conflicted, self-centered, and prone to psychological problems. In addition, these people have severe internal consumption, poor spleen and stomach functions, and significantly increased obesity.

Second place: blood type B.

Through adequate blood routine testing, people with blood type B have good physical fitness and strong anti-virus ability. Immunity is the first of the four blood types. According to the comprehensive analysis, the life expectancy of blood type B is about 78 years, which is related to the relatively longevity of the blood type.

In addition, patients with type B blood have strong immunity, fast metabolism, no accumulation of garbage toxins in blood vessels and stomach, and overall health.

First place: blood type O.

Type O blood is known as the universal blood type in the medical world. Type O blood can be combined with type A blood and type B blood. Therefore, medical staff will have enough professional testing for type O blood. The study found that the average age of blood type O is about 85 years old.

People with blood type O are confident, determined, noble and calm. Once they face reality, they go all out. Once they've made up their minds, it's hard to change. As long as they think they're right, they can stick with it.

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Whose blood type will the child inherit?

General analysis: The blood type is determined by the blood type genes of both parents. It cannot be said unilaterally that a child will inherit the parent's blood type. The specific analysis of blood type consists of three genetic factors: blood type A, blood type B and blood type O.

The blood type of most parents can determine the blood type of the baby. The inheritance law of blood type is: a+a=a or O, a+B=a or B, or O or AB, a+a=a or O, a+AB=AB or a.

According to the above table of blood group inheritance law, it can be effectively observed that if the blood types of the husband and wife are A and B, the blood type of the baby may appear other than A or B, or O or AB.

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What is the difference between blood types?

The most commonly used blood group systems are the ABO blood group system and the RH blood group system. The ABO blood group system divides human blood into A, B, O, and AB. The differences between the four blood types are:

Type A blood refers to the expression of antigen a on the surface of the red blood cell membrane, and its serum does not express antibody B.

Type B blood means that type B antigens are expressed on the surface of red blood cell membranes, but no antibodies are expressed in serum.

Type O blood does not express A antigen nor B antigen, and its serum contains A antibody and B antibody.

Type AB blood expresses both A and B antigens, and there is no antibody in the serum.

Blood type AB accounts for about 10%, and blood types A, B and O account for about 30%. The RH blood group system is divided into RH-negative blood and RH-positive blood according to the expression of D antigen on the erythrocyte membrane surface. If the D antigen is expressed on the surface of the red blood cell membrane, it is RH positive blood. If the D antigen is not expressed on the red blood cell membrane surface, the blood is RH negative.