N Theories Of Aging

In contrast to the life span of a species, which is an evolved, positively selected life-history trait analogous to a biological "warranty period," aging is a byproduct of evolution analogous to the progressive deterioration of any system that increases the likelihood of failure. Inasmuch as the concept for designing a machine is fundamentally different from the concept for understanding its deterioration, it follows that a theoretical framework for understanding life span must necessarily be different from the theoretical framework for understanding aging. Therefore, the purpose of this section is to provide a brief overview of the main theories of aging. We begin with a description of the theory concerning why all sexually reproducing organisms grow old, followed by the more conventional theories ordered hierarchically—molecular, cellular, systemic, and evolutionary.

Was this article helpful?

0 0
Weight Loss New Years Resolution Success

Weight Loss New Years Resolution Success

Sure you haven’t tried this program before but you no doubt aren’t a stranger to the dieting merry go-round that has been plaguing your life up to this point.

Get My Free Ebook


Post a comment