At all times, people were interested in: why does a person die? In fact, this is a rather interesting question, for the answer to which several theories can be considered that can shed light on this situation. There are many different opinions on this subject, but in order to understand what death is and why a person is subject to this, it is necessary to solve the mystery of old age. At the moment, a large number of scientists are struggling to solve this problem, completely different theories are being put forward, each of which, one way or another, has the right to life. But, unfortunately, none of these theories has been proven at the moment, and this is unlikely to happen in the near future.
Theories related to aging
As for the opinions on the question “Why does a person die?”, All of them are as diverse as they are similar. And the common thing with these theories is that natural death always comes with old age. A certain circle of scientists is of the opinion that old age as such begins at the moment of the emergence of life. In other words, as soon as a person is born, the invisible clock begins its reverse course, and when the dial is reset to zero, then the person’s stay in this world will cease.
It is believed that until a person has reached maturity, all processes in the body proceed in an active stage, and after this moment they begin to fade, along with this the number of active cells decreases, which is why the aging process occurs.
As for immunologists and some gerontologists who tried to find the answer to the question “Why does a person die?”, From their point of view, autoimmune phenomena increase with age against the background of a decrease in cell response, which, in essence, leads to that the body’s immune system begins to “attack” its own cells.
Genetics, of course, say that the whole problem lies in genes, while doctors say that human death is inevitable due to defects in the body that accumulate throughout a person’s life.
Law of nature
But still, why do people age and die? Perhaps, in this way, human nature was conceived in order to ensure the perfect balance on the planet? After all, if people had never died, then after a short time they would have flooded the entire planet, thereby leading it to irreversible death. But at the same time, you should first turn your attention to the fact that the aging of the body began not with people, but with unicellular ciliates. The problem is that it is almost impossible to create perfect DNA, even though a person is already able to edit his program. Thus, we can summarize and give a more or less adequate answer to the question of why a person is dying. This is due to the fact that human DNA is not able to constantly maintain the balance of the body, without experiencing any loss. In order to maintain this balance and prevent the onset of cancer, the body's life processes begin to slow down, which leads to aging and, as a result, to death.
Sudden death
Based on international recommendations, a sudden death within 6 hours after the first symptoms is often due to the cessation of cardiac activity or for any other reason that cannot be determined. In other words, for doctors, a sudden demise means death without any known cause. For example, if a person was hit by a car, and his death was instantaneous, then this does not mean at all that there was a sudden death, as the cause of it was injuries incompatible with life. Having dealt with the definition, now we turn to the symptoms that may serve as a prerequisite for a sudden death.
Symptoms of Sudden Death
Among the signs that can say 100 percent about future problems is a lack of blood circulation. But in order to diagnose this, you need to have basic skills. When measuring a pulse, it must be understood that this should not be done on the radial artery. Measure the pulse on the external carotid arteries, the best way to do this is to measure the pulsation on the neck. This is done as follows: the number of strokes that are counted in 15 seconds must be multiplied by four - and you get the number of beats / min.
Convulsions and a lack of consciousness are the second signs that may indicate a state of clinical death or obvious disturbances in the functioning of the human body. At the same time, seizures can be quite difficult to determine, since they are often very fleeting, and with the turmoil that creates in a stressful situation, it happens that nobody pays attention to them, and it’s very vain.
The presence of adequate breathing or its absence can also indicate problems. Adequate breathing refers to approximately 16–22 respiratory movements in 60 seconds. You can still look at the reaction of the pupils to the light, but you can not evaluate this symptom as reliable, since the pupils may respond inappropriately depending on some drugs or even due to the use of drugs.
Causes of Sudden Death
Sudden death (the causes of which can be varied) is mainly due to ischemic heart disease, the onset of ventricular fibrillation, or, less commonly, asystole of the heart. But, despite the fact that, according to statistics, about 90% of all deaths are caused by heart problems, there are still quite a large number of problems due to which this can happen. Despite this, sudden death, the causes of which were mentioned above, actually threatens only a small percentage of humanity, and those who lead a healthy lifestyle do not fall into the risk group at all.
Where can sudden death be taken by surprise?
As practice shows, it can catch a person absolutely anywhere in the world and at any time. But the problem is not where sudden death can occur, but that the correct diagnosis is not always and cannot always be determined. It should be understood that there can be no sudden death in a person who was treated in a hospital and suddenly fell dead: it is obvious that clinical trials and analyzes were carried out, on the basis of which a history was recorded, etc. Thus, it is set exclusively clinical diagnosis. The same is true if a person died as a result of a protracted illness.
Main causes of death
Referring to statistics, heart disease is considered the main cause of all deaths worldwide. As for the second most common cause of death, it is worth noting such a terrible disease as cancer. In countries like China, people are more susceptible to liver cancer, while lung cancer is more common in Switzerland, Spain, Austria, Portugal, the Netherlands and Denmark. The cause of death, ranking third in the list, should be called AIDS (HIV). Such “popularity” was obtained because of Africa, while in the USA and Europe they were able to more or less cope with this problem. By the way, with regard to Africa, the problem of tuberculosis is also relevant in this country. The causes of death precisely because of this disease are due to the fact that the country has a very low level of hygiene, and vaccination is not widespread so that all segments of the population can feel safe.

Among all the countries of the world, Mexico should be especially noted. This is the only country where the main cause of death is cirrhosis. This is due to the fact that residents of Mexico consume alcohol in a relatively large amount, and also because of the widespread spread of hepatitis C.
The less common diseases that are “relevant” mainly in Asia and Africa end this list. The causes of death in these countries are mainly renal diseases and respiratory diseases.
Death in a dream
Many people think that the best death is when you are sleeping. Maybe this is the best way to escape from life, only no one can confirm this. But as for death in a dream, this is a fairly common fact, especially among older people. Question: Why do people die in a dream?
Thanks to scientists from the United States who conducted research on this issue, it became known that people die while they are in the "kingdom of Morpheus", mainly due to respiratory arrest. This happens mainly in elderly people due to the loss of cells that control the respiration process, sending out signals to the body to produce lung contraction. In principle, such a problem can occur in a mass of people, its name is obstructive apnea, and this problem is the main cause of snoring. But there can be no such cause of death as obstructive apnea. This is due to the fact that a person experiencing oxygen starvation (insufficiency) wakes up. And the cause of death is central sleep apnea. It should be noted that a person may even wake up, but still die due to a lack of oxygen, which will result from a stroke or cardiac arrest. But, as mentioned earlier, this disease is mainly affected by older people. But there are those who die, and never live to old age. Therefore, a reasonable question arises: why do people die young?
Death of the young
It’s worth starting with the fact that in recent years, approximately 16 million girls in the age group of 15 to 19 years become women in labor. At the same time, the risks of infant death are much higher than those of girls who crossed the 19-year-old barrier. These problems are due to both physiological factors and psychological.
Not the last reason is unhealthy diet, and this is due to both obesity and problems associated with anorexia.
Smoking. Drugs. Alcohol
As for bad habits, such as the abuse of alcohol, nicotine, and even more so drugs, this problem affects every year the younger sections of the population, which not only put children at risk, but also themselves.
But still, the most common cause of death among young people is unintentional injuries. The reason for this may also be alcohol and drugs, not counting youthful maximalism, which cannot be discounted. Therefore, until the adolescents have reached the age of majority, all responsibility for moral and psychological education rests entirely with the parents.
What does a person feel at the moment of death?
In fact, the question of human feelings after death worried all of humanity throughout its existence, but only recently they began to say with confidence that all people at the time of death experience definitely the same feelings. This became known thanks to people who survived clinical death. Most of them claimed that even lying on the operating table, in a state of immobility, they continued to hear, and sometimes to see everything that was happening around. This is possible due to the fact that the brain dies in the last place, and this is mainly due to a lack of oxygen. Of course, there are stories about the tunnel, at the end of which there is a bright light, but actually this information is not reliable.
Finally
Having delved into the problem and understanding it, we can confidently answer the question: why does a person die? Quite often, people ask themselves similar questions, but you should not devote your life to the problem of death, because it is so short that there is no time to spend it on knowing those problems for which mankind is not yet ready.