Why do humans only live 120 years at most? And then died? Keep it simple

This is related to the programmed death of humans themselves, which is controlled by genes.

In the process of human growth, as the cell continues to replicate, the length of the telomere will gradually decrease, until it reaches a special position, the cell will automatically start the process of programmed apoptosis, and the cell will self-destruct.

However, some cells, such as cancer cells, contain a special RNA enzyme called "telomerase", which can automatically repair the length of telomeres that have decreased due to replication, so that cancer cells will never die, which is why cancer is difficult to **.

1.The genes of the human body are determined.

2.The foods that people eat, these foods are inherently life-limited.

3.Causes of the Earth's rotation.

4.The aging of cells and the death of life are scientific research problems around the world.

Because the body functions will slowly age, and then they will get sick, and the level of medical treatment determines that they cannot be completely cured, so almost all the elderly die of illness

It's like a machine that gets old and then breaks down

How much people hope that the life expectancy of human beings can be increased to 500 years, 1000 years or even eternal life, but now scientific and technological research shows that it is impossible for human beings to achieve immortality, and the most important thing for human beings is, theoretically speaking, how many years can human beings live?

The physiological system has aged so it will die.

Cell metabolism, aging of human body functions.

Cells are starting to age. Simple, just ......

The cells are old. So I got sick and slowly died.

When the cell cycle arrives, the organ declines, just like an old machine

I've lived for 120 years, and it's no fun to live.

Because people's lives are becoming more and more irregular, there is no good adjustment of work and rest time, and they usually consume a lot of junk food, so their physique is gradually not good, their immunity is also declining, and most people do not live to be 100 years old.

Because most people are very lazy, especially when they get older, they don't like to exercise, eat and rarely absorb nutrients, so that their age will not be so long.

That's because in the process of life, many people don't respect their bodies, so there is such a difference.

The most credible lifespan now recorded is 117 years.

Emma Molano, the world's oldest man, died on April 15, 2017, at the age of 117 at her home in the small city of Verbania in northern Italy.

This is the highest lifespan with a file that can be checked, a birth certificate, a traceable biography, a complete personal file, and no objections.

The other 134-year-old, 256-year-old, and 445-year-old are basically unverifiable, or the files are incomplete, and some don't even remember their birth year (perhaps intentionally or unintentionally).

As for whether it can reach the age of 120, according to existing medical research, the ultimate life expectancy of human beings should be 115 years old, more than this number, it can be regarded as a superpower, and it is not difficult for ordinary people to live to the age of ** disease-free, but it really depends on genetic inheritance when it is over 100 years old.

If no one in the family has lived past the age of 100 within three generations, the chances of being a centenarian are very low.

However, these are normal conditions, and it is difficult to guarantee that there will be any new discoveries in medicine in the future, it can only depend on luck...

Theoretically, but due to various factors, only a very small number of people can achieve it, and I believe that with the progress of society, more and more people will enter the ranks of longevity ......