What is the principle of blood recognition? Why is Blood Fusion? Could it go wrong?

This is nonsense. The fusion between blood and blood is the rule of blood transfusion in our daily life, the same blood type can be transfused to each other, type O blood can be transfused to any blood type... If this rule is not followed, the interaction between the two blood types will coagulate, causing life-threatening.

The blood type is not all the same between relatives)

Blood of the same blood type is compatible, and blood type O blood is even more compatible with blood type A b AB.

a＋a→a,o；

a＋b→a,b,o,ab；

a＋o →a,o；

a＋ab→a,b,ab；

b＋b→b,o；

b＋o→b,o；

b＋ab→b,a,ab；

o＋o→o；

o＋ab →a,b；

ab＋ab→a,b,ab.

You can check it out.

Put salt water, chicken blood and human blood can be accommodated, and the blood of Lao Tzu's son will not be dissolved if you put vinegar. There is no scientific basis for blood drops. Even if you test your DNA, they will only give you a few percent similarity

It is because you have the blood of your relatives in your body, and because you were born by your parents, so academic integration means that it is the same category and there will be no mistakes.

HumanABO blood group systemThe blood type of an individual can be roughly divided into type A, type B, type AB and type O, and some of the types are subdivided into homozygous and heterozygous, such as type A can be subdivided into type AA and AO; Type B can be classified as BB or BO. Simply put, homotype blood compatibility, heterotype blood agglutination.

Dripping blood to recognize relatives. It has its obvious limitations. The first is a simple and rough method of thick lines, which is not accurate and reliable. The ancients were limited to the level of science and technology, and there was no better way, so it can be said that they had to use it as a last resort.

Secondly, even in ancient times, this was mostly only available to immediate family members, and some special cases cannot be ruled out. Modern scientific development.

To this day, almost no one is using this unreliable method.

Blood type is controlled by genes:

A person has two copies of each gene, one from the father and the other from the mother. Behind the heterozygous and homozygous blood types mentioned above are the differences in individual genes caused by marriage in human beings. In general, blood of the same blood type is compatible.

Between immediate family members, such as empty remorse, father, son, mother and daughter, blood cells.

Related genes are assigned to offspring by parents according to the law of genetic segregation.

The other components of body fluids, including immunity, have also undergone a series of screening and adaptation, and their blood is generally compatible, otherwise the mother's October pregnancy cannot be completed. However, there is no immediate family relationship.

The blood samples of the two buckets are mixed together, which in most cases will trigger specific blood agglutination precipitation or even hemolytic reactions.

Using the method of blood to determine whether the child is his own is not advisable and not rigorous at all. If you want to identify whether a child is biological or not, it may not have been possible in ancient times, but today we can use DNA testing, which can avoid the occurrence of error probability and ensure the preparation of results.

The so-called blood recognition is like what is often seen in film and television dramas, take a bowl of water, drip the blood of two people in the water, and wait to see if it is fused. If the blood of two people is fused together, it means that they are related, and if not, it means that the two are not related.

However, if you add alum or warm water to the water, it will accelerate the fusion of blood, which means that even the blood of people who are not related to each other can be fused.

In fact, according to medical research, this method is only 60% accurate, which means that it is not that accurate, and we cannot use this method as a standard for determining paternity.

When we watch costume dramas, we basically appearDripping blood to recognize relatives. This scene was also real in ancient times, but there is no scientific principle for this kind of blood recognition. It doesn't matter if we're related by blood or not.

As long as the blood is dropped in water, the blood will automatically fuse together. If you want to know whether there is a blood relationship, only the DAN test we use now is the most accurate.

Drip bone and blood are the two methods of recognizing relatives in ancient times, dripping bone is to drip blood on the bones, if the blood seeps into the bones, then they are relatives; The other is blood, that is, take out a drop of the blood of two people and put it in a bowl, if it is fused together, it is a relative, if it is not fused, then there is no blood relationship.

There is an advantage to dripping blood to recognize relatives, that is, you must be able to drip out a father and a town, if you persist, you can drip out a lot of fathers, and the disadvantage is that those who can be integrated are not necessarily their own fathers.

Blood is composed of many substances, the most critical component of which is water, because blood contains water, so whether the two are related by blood or not, as long as they are put together, they will definitely fuse. Someone once did an experiment to drop the blood of two unrelated people in the same test cup, and the result was that the blood quickly dissolved together, and the result was the same when another person tried it.

Finally, some medical points out that as long as the blood is put into the water, according to the theory, it can be dissolved together, so there is no scientific basis for the ancients to recognize relatives by dripping blood, and of course it is even more unreliable.

In ancient times, the method used to recognize relatives often had no scientific basis, and there was now a paternity test in Xianweiyu.

It is mainly judged by human genetic markers for final screening. Our paternity testing technology is very mature and the waiting time for results is very short.

There is no scientific basis, cross-coagulation is only meaningful in the case of the same blood type, and it is a very unscientific method to simply recognize relatives by dripping blood of early sails. That is, you can't do what you are willing to prepare, and you can't do a negative reply to the land.

Because about half of a person's blood is plasma, and the other half isRed blood cellsWait. Once the red blood cells enter the water, due to the inside and outside of the cellOsmotic pressureThe difference is that the fragile cell membrane is broken at once, insideHemoglobinAnd it spread out. Although different people's blood types can carry differences, the structure of hemoglobin is exactly the same.

Therefore, no matter whose blood it is, it will become one in the water and gradually become indistinguishable.

Introduction:

Hemoagglutination is a serum immune response that can occur when blood of different blood types meet, while blood clotting is the clotting factor of a person's blood in their own blood.

Enzymatic reactions that occur under the action. When a blood vessel ruptures or the blood encounters a rough surface, the clotting mechanism in the blood is activated, platelets.

The fibrin in the serum coagulates together on the wound surface and prevents blood from flowing out. If the body lacks platelets or a clotting factor, the blood will not clot.

Haemophilia. It is a genetic disease with defective blood clotting function in the past life. In medicine, anticoagulants are also commonly used to remove calcium ions involved in blood clotting to prevent blood clotting.

Because there are no clotting factors such as fibrinogen and platelets in the serum, the serum will not coagulate.