Why do people get old and die, please everyone, thank you

This is the law of nature, and until now scientists have not been able to answer the question of for single-celled organisms, the death of a single cell is the end of their life, and for multicellular life, such as humans, death has not been definitively defined. Theoretically, the cessation of metabolism marks the death of an organism. However, this does not apply in practice, because it is difficult to determine whether all the cells of an organism have stopped their metabolism, and in many cases there is no point in survival if they are unconscious and unable to carry out nerve reflex activities, but this situation is challenged by vegetative people to get back to business.

The death of a single cell in a multicellular organism does not represent the end of life for the whole organism, but rather the aging and death of a large number of cells, and scientists are exploring this question. The most popular theory is that there is a fragment of "programmed death" in the genetic material inside the cell that causes the cell to naturally age and die at a certain stage, and for multicellular life, this fragment not only controls the death of individual cells, but also controls the death of the whole body.

Because every organ of the human body has a lifespan, when it reaches a certain limit, the function of the organ will gradually degenerate and fail, resulting in the inability of metabolism to continue, and the person will die naturally. Of course, disease is caused by the occurrence of lesions in cells due to the combined influence of internal and external factors, or the invasion of external viruses and bacteria into the human body, which damages the important functions of the human body. resulting in death.

When we get old, our cells don't have the function of living, and we can't breathe and we die. ^_

Because after the failure of human organs, the stem cells that make cells gradually die, if the cells suffer death, they cannot be replenished in time, and the cells will become fewer and fewer, plus there is a place in the human brain called"Seahorse", grasp people's memory, at this time it is also obviously exhausted, people can no longer be very easy to accept new content at this time, which is why people are old and useless. In the last month of life, due to the continuous death of stem cells, the speed of the heart slows down, and the cells of the stomach are also attacked by the ultra-acidic gastric juice for digestion, and continue to thin, and finally after the last few minutes of death, the human membrane ruptures, and the blood rushes into the stomach, causing gastric congestion, and finally rushes into the heart, at this time, the heart and brain are starved, the heart beats impermanently, the brain also begins to die, a brain cell and other brain cells The relationship line is broken, death, the person begins to coma, but can still see things, until finally death.

From a modern scientific point of view, it is a decline in bodily functions.

Our bodies are 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 that exist in each cell.

However, after the age of the source oak, the ability to make new cells will gradually decrease, and the old cells will increase. This is the cause of aging. As aging intensifies, wrinkles increase, teeth fall out, and the body becomes more susceptible to disease, stagnation of body functions, and death occurs soon.

People in the world may do and think in various ways, but the common law of people in the world is birth, old age, sickness, and death, without exception. People will die because they were born into this world, and this rule must be followed, and you will not come if you don't come. So "life" is the cause of "death", and "death" is the result of "life".

If you want to be immortal, there is only one way, and that is to be "unborn", and being in a state of immortality is called nirvana. But throughout the ages, no matter how advanced modern technology is, immortality is just a delusion of beauty. Hope.