what do you know about death?

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Death can result from diseases, injuries, poisoning and such. These can cause irreparable damage to tissues and organs, and disturb the inner balance that allows vitality. All living creatures die, even if they hadn't suffered any particular affliction. Furthermore, every species has its own, typical life expectancy. Humans, for example, don't usually pass the 100 year mark, even when they are generally healthy and living in a secure environment. In human, similar to most mammals, one can discern a slow deterioration in the body's vitality, which eventually results in death. Research is being lead today to discover the cause of the body's natural deterioration coming into old age. Even though findings are generally inconclusive, several theories have been proposed. One theory proposes that the body's deterioration is caused by genetic reasons, as the human genome contains a self-destructive mechanism that kicks off after a specific length of time. Another theory suggests that there is a limit on the rate of cell division which ultimately leads to cell demise (see Telomere). That said, many studies show that a proper diet and nutrition together with regular physical activity can extend life expectancy. In third world countries, inferior sanitary conditions and lack of access to medical technology makes death of infectious diseases much more prevalent than in developed countries. On the other hand, some of the causes of death in the developed countries are almost non-existant or quite scarce in the third world - diseases resulting from unhealthy, high fat and high cholesterol foods or diseases stemming from air pollution.