Abstract
At a biological level, normal ageing or ‘senescence’ results in limitation of function, increased risk of disease and ultimately death. The pattern, onset and rate vary between individuals and appear not to be the result of a single overarching mechanism but instead that of a complex interplay between intrinsic and extrinsic factors. As such ‘chronological age’ and ‘biological age’ often widely differ. The effects of the ageing process are becoming more important to consider as each generation passes, due to increased life expectancy and other demographic changes.
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