Why is it so rare to hear about people dying of old age?

It is rare to hear of people dying of old age because many of them are now dying of disease. Because in the past, the things that people ate or used were relatively safe, but now the food people eat is not very safe, so there will be all kinds of diseases.

World Health Organization.

The Global Assessment of Disease Status was updated to show that in the past 10 years, ischemic heart disease, stroke.

Lower respiratory tract infections and chronic obstructive pulmonary disease.

Remain the four leading causes of human death.

Human immunodeficiency virus.

HIV) decreased slightly, from 10,000 deaths in 2000 to 10,000 deaths in 2012). Diarrhoea is no longer one of the top five causes of death, but it is still one of the top 10 causes of death. In 2012, diarrhoea killed 1.5 million people.

In 2012, NCDs accounted for 68% of global deaths, up slightly from 60% in 2000. The four major noncommunicable diseases are: cardiovascular diseases.

Cancer, diabetes.

and chronic lung disease. Infectious diseases, maternal, newborn and nutritional status account for 23% of global deaths and 9% of injuries.

In low-income countries, nearly 4 out of 10 deaths are in children under 15 years of age, and only 2 out of 10 deaths are aged 70 years. People die mainly from infectious diseases: lower respiratory tract infections, HIV and AIDS, diarrhoea, malaria and tuberculosis.

These diseases account for nearly one-third of all deaths. Preterm birth, asphyxia, complications of childbirth are the leading causes of neonatal death, leading to neonatal and neonatal deaths. So it's for these reasons that people almost don't die of old age.

Because people's lives are getting better and better, and there are more and more emergencies and miscellaneous diseases, there will be very few cases of people dying of old age but not getting sick.

Because when a person reaches a certain age, all organs of the body will begin to slowly degenerate, and finally stop working.

Because there will be many accidents in a person's life, it is said that there are very few people who die of old age.

Because many deaths in modern people are accidents or diseases, and they do not die of old age.

Because the various body organs of the human body have different degrees of aging, it is not possible for all organs to stop paying at the same time at the same time.

Maybe it's because life now comes with all kinds of accidents, and few people can die like this.

Because medical technology is very developed nowadays, it is unlikely that the functions of the human body will die of old age.

In general, even the slightest problem in an older person can lead to death.

I think it's mainly because the current things are very harmful to the human body, so there are very few old people who die.

From the perspective of modern science, the cause of death from old age is the decline of bodily functions. The human body is made up of about 60 trillion cells. By duplicating old cells to create new cells, and replacing old and new cells, the body grows.

This is controlled by the genes present in the individual cells.

Each cell knows how long they will live, a phenomenon called programdeath, and when a cell has been working for a certain period of time, the cell begins to fatigue, decay, and die. At this time, the organs slowly lose their function, so that we degenerate and die.

In other words, senescence is a genetic characteristic of cells, so cells always have to age. Changing conditions has the potential to modulate the expression of senescent genes, thereby delaying cellular senescence or even preventing senescence genes from expression, such as cancer cells. But in normal cells, although aging may be delayed, aging always happens.

The main causes of aging are as follows:

1.Excessive oxidation.

The harm of excessive oxidation in the human body will accelerate aging, disease, and death; Causes tumors to grow rapidly; Trigger inflammation and autoimmune reactions that destroy the body's health; Pigmentation is produced, and pigmentation appears.

2.Cell lifespan.

Filling the interstitial space of the cell with metabolic waste products can also lead to cell senescence; Cellular mutations and chromosomal aberrations can also induce aging, and common causes include ionizing radiation, radiation hazards, etc.

3.Failure is the failure of the whole body.

The mental blow makes people suddenly age, indicating that the brain center has a huge impact on aging. Some people will quietly disappear soon after the death of their old spouse, which is a typical example of aging affected by the central nervous system.

4.Protein aging.

Possible pathways are: errors in protein synthesis; nucleoprotein aging; Abnormal genes cause impaired protein synthesis, which causes aging of life.

5.Endocrine hypofunction.

Some scholars believe that the decline of gonad, thyroid, adrenal gland, pituitary gland and other functions will induce rapid aging of the human body. For example, patients with thyroid disease are prone to premature aging. In addition, the idea that aging is exacerbated by thymus atrophy has attracted more and more attention from experts and scholars.

6.Microcirculatory disorders.

Due to the deposition of a large number of metabolic wastes in the human body and the adhesion of pathological metabolic residues, many microvascular systems are destroyed, resulting in narrowing or even closure of the lumen of blood vessels, resulting in microcirculation and circulation disorders, and limiting the exchange activities of life metabolism, resulting in the aging of cells.

7.Hormonal deficiencies.

Hormones play a role in regulating the constancy of the internal environment of the human body's metabolism, the coordination between organs, growth and development, reproduction, etc. Hormones maintain the normal operation of human physiology, and if hormone secretion is out of balance, it will cause physiological functions to decline and age, and various symptoms of maladaptation will appear.

Categories: Education Academic Exams.

Problem description: Why do people die without illness and injury?

Analysis: People die because of chromosomes. Man is a part of nature, if nature is a living body, man is a kind of cell of it, normal cells will die because of metabolism, if there are immortal cells, nature will be dangerous.

There are also immortal cells in the world that have mutated to get rid of their metabolism, and that is cancer cells.

As for the meaning of life, from the perspective of consciousness, people live to be happy, just like some people want time to slow down when they are happy, and hope that time will slow down when they are unhappy, and if they lose the confidence that they may be happy in the future, they would even prefer to die. Because everyone's path to happiness is not exactly the same, everyone's way of living is different.

There is a beginning and an end, and when the human body reaches the limit of its bodily functions, it will also produce death.

As human beings age, their bodies and internal organs will also die of old age as they decline.

People can also die when they are frightened, and when they are extremely frightened, the adrenaline rushes up, when they exceed their personal limits. It can lead to coma and even death.