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While many are looking for the legendary Fountain of Youth, you may wonder
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Did we get older already. What's wrong in our bodies or our cells
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Which us grow بطبيعتنا? There are a variety of factors internal
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And external, such as food, sports and pressure of the ocean in which we live,
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All of which contribute to the damage and repair cells and affect the rate of aging.
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But what is surprising is that in spite of these factors, we have in fact biological clock
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Buried in تركيبتنا, genetic, and can not work this time forever.
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In other words, we are programmed to die. The body consists of trillions of cells
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That constantly subject to cell division, and every time divided
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Make a copy of the DNA as well. The latter tightly packed structures
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Called chromosomes,
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Rights available on 23 pairs of them. Problem remains in the fact that copies DNA is
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Full because it exceeds the parties each chromosome.
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For about without disrupting the important information from DNA, Ntoffer of the
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Something called telomeres at the ends of chromosomes, which are essentially
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Parts of duplicate DNA and meaningless can afford to lose.
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But every time our cells divides, the telomeres become shorter Voqsr
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Until it is completely removed in the end, not the cell then divided.
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Some flat worms are able to renew the telomeres are not final, making it
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Already biologically immortal. But different ages and remain
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Susceptible to diseases, and this suggests that a combination of aging
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Genetic factors and environmental factors.
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But why does not our cells with this? In the end, this limited copies
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In fact, helps in the prevention of cancer, which is the cellular growth can not control it
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While avoiding cell death. The point at which they stop cell of copies
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Called cellular senescence.
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In humans, the copying process is in the range of about fifty times. Once the limit is reached, the start
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Loss of cell function that gradually die, causing properties
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Linked to age. This also helps to explain not life expectancy
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A strong inherited from your parents, because you got the telomere
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The first of them.
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