What is the concept of normal old age?

The death of the elderly mentioned by the subject should be the gradual decline of an asymptomatic organ within the scope of compensation, and it is not until the last moment that pain is felt. Analysis of most people's descriptions of this kind of death shows that people are basically fine, sleepy at night, sleep and leave the next day.

When the function declines, cell repair is not enough to resist dead cells, the organs are close to withering, a cough leads to alveolar rupture, and the body tries to secrete adrenaline and other maintenance measures, but the reality is that it can no longer provide more energy, and then breathing gradually stops.

There are two possibilities:

The probability is 1, and important diseases, such as stroke and heart disease, all occur suddenly during sleep. The teacher said before that it is easy for old people to die when they sleep, and it is easy to die when the window is open when the solar terms change. Perhaps the sudden change of temperature has become the cause of some diseases.

Possibility 2, the patient feels sleepy, which is a symptom of the disease, such as cardiopulmonary insufficiency or cardiovascular and metabolic factors, and the brain is gradually deprived of oxygen. But the patients and their families thought they were just tired and fell asleep. Then he left peacefully. So it's good to have an oxygen machine at home. A bedroom with a small room and poor ventilation is more likely to make people lack oxygen. I know it myself.