Download e-book for iPad: Aging: The Paradox of Life by Robin Holliday

By Robin Holliday

ISBN-10: 1402056400

ISBN-13: 9781402056406

ISBN-10: 1402056419

ISBN-13: 9781402056413

For hundreds of years humans were wondered by way of the inevitability of human getting older. for many of the second one half the 20 th century getting older remained a secret, or an unsolved organic challenge. on the finish of the twentieth century a extraordinary medical discovery emerged. It used to be now not a unmarried discovery within the ordinary experience, since it used to be in keeping with a chain of vital interconnected insights over relatively a protracted time period. those insights made it attainable for the first actual time to appreciate the organic purposes for getting older in animals and guy. it might probably already be acknowledged, even if, that the numerous observations and insights that designate getting older usually are not authorized as validated wisdom for a very long time. the sector remains to be filled with scientists, and non-scientists, who're simply satisfied to move on speculating concerning the 'mystery' of getting older. the purpose of this booklet is to dispel lack of information by way of explaining in non-technical language what are the explanations for getting older and the parable of over the top prolongation of lifestyles.

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Example text

Colonies of animals can form, in which it may be hard to determine whether an individual animal is a single polyp or a whole cluster of polyps. Other animals, obviously related to primitive forms, are known as flat-worms. Many are free living, and others have become parasites of contemporary animal species. They have no body cavity, unlike all more advanced animal species, and they retain remarkable powers of regeneration. The Ancient Origins of Ageing 39 Some will produce buds that develop into whole animals, and it has been shown experimentally that pieces of an adult animal can regenerate the whole organism again.

These consequences are one part of the ageing process, as we shall see. The study of cancer is also a large part of all biomedical research. Why is the research so difficult? The answer, at one level, is quite simple. Cancer cells are obviously abnormal, but to understand their origin we have to first understand normality. That is, we have to understand how an organism develops from a fertilised egg into all the multiple components of the body, and also how all these multiple components are regulated and interact with each other.

However, for our purpose, the real biological situation is the relevant one, and this is the maintenance of the normal functional state of the animal. Normal detoxification is the sifting out of noxious chemicals in diet to produce harmless derivatives, some of which can be metabolized by other pathways. Although herbivores are most at risk, carnivores which feed on herbivores may also be at risk, so they have their own detoxification system. In some cases, and particularly in insects, animals have become resistant to plant toxins, and can store them for their own defence against predators.

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Aging: The Paradox of Life by Robin Holliday

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