How should the term "aging" be defined? Biological sciences and social sciences have different views on this, and form a variety of different definitions. Edmund cowdry (1942), one of the founders of senile biology, argues that aging can be seen both as an endogenous process and as an exogenous process [2]. In the biological endogenous view, the aging is not a personal will for the transfer, but because of the passage of time led to changes in the direction of the cells to the adverse changes, this adverse changes continue to accumulate the final performance of aging; Aging is due to infection, accidents or damage to toxic substances in the external environment. Biological science in the interpretation of the biological basis of aging, some …show more content…
Aging process; (5) immunological theory attributed the aging of the immune system function decline, so the elderly are more difficult than young people to resist the invasion of various factors; (6) harmful substances that the cells that their own Protection and repair mechanisms are not sufficient to avoid damage that has accumulated over time, and these damage limits the Regenerative capacity [6]; (7) a gene repressor gene Ping Heng theory to deny the existence of aging, aging is believed due to the damping force gene instead of specific gene since active