Aging of human - is the reducing of physical abilities at the level of physiological functions. It can be illustrated as follows. It turns out that

Aging and human life expectancy [Longevity, span]

Aging of human — is the reducing of physical abilities at the level of physiological functions. It can be illustrated as follows. It turns out that 75-year-old men in comparison to 30-year-old have 10% reduced rate of nerve impulses, the blood supply to the brain is only 80% and to the heart — 75%, the filtration rate of urine in the kidney is reduced by 29% and the efficiency of skeletal muscle is fallen by 30-40%. These changes in organ functions are due to their structural changes. Thus, the amount of taste buds in older men is reduced by 64%, the renal tubules — by 47%, the axons of the spinal cord — by 37%, the lumen of blood vessels due to deposition of cholesterol plaques, even by 29%, and the standard lung capacity is reduced by 44%.

Due to the achievements in modern medicine, life expectancy of human has almost doubled. Historians say that for most of human history, the average life span was very short — about 30-35 years. Starting from the XVIII century, more and more people have been living to a ripe old age. Now the average life expectancy, depending on the standard of living in different countries is 60-80 years. But the most interesting is that this is not possible to increase the maximum age of a person — his longevity.

Officially established record of longevity obviously belongs to Frenchwoman Jeanne Calment, who was born in 1875 and died in 1997, lived for 122 years and 164 days. The top ten official centenarians include a resident of the small town of Ukrainian Lviv district Grigoriy Nestor, who lived a little more than 116 years. Obviously, the longevity limit that is set to a person by his organism does not exceed 120 years, although it can be found mentions about140-160-year-old, and as a legend — a 200-year-old long-livers. However, in those days, when they were born, there was not any strict registration of birth, and therefore the correct date of birth is often in serious doubt. Taken from

Organisms of one species differ from each other by maximum life expectancy similarly as by their body sizes, litter sizes, growth rates and other individual parameters. Homo sapiens are not an exception. What does it depend on? First of all, on the genetic component. It is well known that the parents with high longevity have children with high life span. In addition, it is very important to live in a clean environment. Not by chance among the mountain peoples are the most ones whose age exceeds 100 years. It is very important to lead a healthy lifestyle, do not smoke, do not take drugs, do not abuse alcohol and do not overeat, eat simple, healthy food and drink clean water. An important component of longevity is the life activity. It has been noted long ago that all people with high life expectancy until the very last their days had a physical or an intellectual work.

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