article | Popular science Xiaozhujun
Resurrection from the dead is a topic that attracts attention no matter which period. Human beings are like ascetics on this road, walking towards the road where there is no end, while unswervingly believing that they will definitely reach the end.
So is it possible to achieve such a thing as returning to life in existing science and technology? The question
may be much more complicated than imagined. First of all, we need to understand the definition of death by humans. In which state is , only people are considered dead?
Medically defines brain death as real death, because after the brain dies, all human activities cannot be carried out, and naturally there is no way to breathe. Since you can't breathe, it means that the cells in the body cannot perform aerobic exercise. Generally speaking, when the human body is deficient in oxygen for more than 15 minutes, all cells in the body will die irreversibly. To a certain extent, people in this state are considered real death.
However, the brain is a very complex organ, and the definition of brain death is also very vague. For example, when a person encounters a serious accident and suffers brain damage, but still does not experience brain death. In this case, the death of the circulatory system is the death of the human body. Under normal circumstances, when the heart stops beating for two minutes, it is not very likely that a person will recover.
In other words, there are two definitions of death, one is brain death, and the other is death of the circulatory system. These two ways of death mean that the possibility of resurrection is very different.
In 2019, a professor named Sestein conducted a very exaggerated experiment. He poured a pig that had been dead for 4 hours into the pig's brain with a very special liquid, and it successfully restored the pig's brain cells to its vitality. Not long after, the pig's brain returned to its state of being alive, but there was no way to determine whether the pig was dead or alive.
Professor Sestan, if this mysterious liquid is applied to humans, can it also resurrect humans?
In Professor Cestan's paper, he explained in detail the liquid that revives the pig's brain. The main component is human hemoglobin and blood in a ratio of 1:1. According to medical definition, after brain death, cells in the body will inevitably experience hypoxia.
Human hemoglobin can carry more oxygen , which is equivalent to rushing into the cells with a large bag of oxygen to replenish them with oxygen. But this alone is far from rejuvenating cells. In Professor Sestein's experiment, what is really difficult is not these special liquids, but a simulation technology used to restore the body's blood circulation and excitation function.
Simply put, Professor Sestan took off the brain of a dead pig and put it on a live pig. Then, combined with the special liquid, he used the external and internal double oxygen supply method to restore the brain to its vitality, but still could not reach the state of being alive. It seems that this is not an experiment to bring about a resurrection, but rather an alternative organ transplant. At present, this technology is still very controversial and no relevant information is found online.
In fact, humans have tried many things to do about resurrection. For example, the freezing experiment that is often circulated on the Internet. The freezing technology uses liquid nitrogen to quickly cool the human body at a speed of minus 180℃. At this temperature, it can prevent ice crystal from punctureing cell tissue . Simply put, it is to freeze all cells in the human body in the moment before death.
When future technologies are developed enough, wake them up.Another way is to repair chromosome telomeres. The telomeres of chromosomes represent the number of times cells divide , and the number of times cellular divisions means the cycle of a person's life, but in these technologies, humans have not made any progress yet.
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