Gerontology, the "bad" means "failure", "recession"
, "Old" means "aging." As early as two thousand years ago <Songs> in
that is "on both the old and not bad" words, but "bad" and "old" cup
of the same general English literature "aging" is the word "aging
"said, and precisely," aging "is intended to refer to" aging ", the
no" recession "implies. English vocabulary and is the equivalent of
aging "senescence" As for the other English words "senile" is a more
reasonable step aging, Chinese equivalent of "senile." In fact, the
body evolved from a youthful vitality to the body with age, yang
weakness, sex fluid loss, lack of blood, there organs dysfunction,
imbalance of yin and yang qi and blood, tissue cells of slow,
progressive, degenerative disorder of sexual function and incidence of
lower systemic, multi-system, the process of gradual functional
decline and overall performance, the performance of human aging organ
for a local or a degradation of form or function, it is the overall
aging of the reaction of the body is the body's development, growth,
Zhuang Sheng, recession the inexorable law of physiological processes.
Pathological aging men began 55 years before menopause or menopausal
women from the beginning, many patients have different "virtual liver
and kidney failure" of clinical performance. Chinese Consumption of
aging is the scope of internal injuries and internal organs are
closely related, with the kidney is particularly close, it involves
multiple body organs, multiple system function and morphology, and
internal environment, functional adaptability and the overall decline
in metabolism.
How old can live the highest human history is littered with records,
but not many well documented, the general life expectancy of 70-80
years, however, some people go to live to 150 years old. Such as the
UK is sixteen Thomas Parr, who live longer famous seventh century, is
said to live to 152 years old.
5 million years ago the average life expectancy was 10 years old
Africans. 15,000 years ago, average life expectancy of more than 20
years the Europeans, the Romans 2,000 years ago the average life
expectancy of 40 years, only to nearly 400 years it has rapidly
developed to extend the average life expectancy, while developing
countries are still short side, in primitive society, As the harsh
natural environment and infectious diseases, and because competition
for food, most people do not know less than older died. Today the
developed countries has reached seven-year-old life expectancy, most
people are no longer killed, but died of aging, should be especially
noted that the extension of average life expectancy of young adults
not due to extended period, but because of old age, even sent a state
people who are not pushed back into the old time, which indicates that
the improvement of living conditions, failed to slow down the rate of
aging. Life expectancy has benefited from the social civilization, and
not due to the genetic characteristics of human Metropole. Only when
people understand the regulation of longevity genes control means will
it be possible to artificially slow down the rate of aging, making the
maximum life span is extended, and mostly of young adults should be
extended so far found only limited food can extend the maximum life
span, does not mean Mankind has mastered the regulation of longevity
genes.
To animals, its highest life expectancy and how much it? Living in the
natural environment of live animals to a maximum of life without prior
or human predation can be natural enemies, so to determine the limits
of their life more difficult. Insects, for example, various types of
insects originated from a common ancestor, but a variety of insect
life on the difference between the very poor. Drosophila important
conditions in the appropriate life of only 40-80 days, 12 can complete
a century, while the cicadas break to 8-12 years to complete one
generation, a difference of nearly a hundred times. Biological
differences between groups is even greater, so they took the shortest
life span of mammals gold vole, is also longer than the life span of
fruit flies at least 20 times, elephants can live for 100 years, that
lived a ground squirrel 50 generations of elephants still alive.
Oldest animals such as crocodiles, whales, turtles recorded over 300
years old. According to August 14, 1992 "Technology Daily", Hubei,
caught three pairs of "Yuanyang Turtle" an expert appraisal, the
turtle may be 800-1000 years old age.
This shows that biological life is relative, related to very limited
life, the longest life expectancy in the human mammals, which in
different species is a reflection of aging at different speeds, they
are regulated by genetic factors, including inherent genes and
environmental factors after.
