Biologic Theories of aging

1)Autoimmunity Theory(States that with aging the body becomes less able to recognize and tolerate itself. As a result, the immune system produces antibodies to act against itself 2)Free radical theory(States that highly reactive cellular components known as free radicals reduce cellular efficiency and cause cellular waste to accumulate. These free radicals are said to accelerate aging and result in death of the organism 3) Wear and tear theory(States that structural and functional changes associated with growing old are accelerated by abuse of the body 4)Genetic Theory(States that life expectancy is hereditary.