People age every day because it is in the human nature to age and grow. Human aging is physiological changes that take plave in the human body leading to senescence which is the decline of biological functions and of the ability to adapt to metabolic stress. In humans, the physiological development are normally accompanied by psychological and behavioral changes (Shock, N.W. n.d.).
Aging begins as soon as adulthood is reached and is as much a part of human life. The life span include infancy, childhood, adolescence and elderly. The biological - physiological aspects of aging include both the basic biological factors that underline aging and the general health status (Shock, N.W. (n.d.)).
Since the probability of death increase rapidly with advancing age. Physiologists have found that …show more content…
Analysis of these variations through appropriate cross-national research may assist greatly in the formulation of effective policies aimed at enhancing the health status, as well as the social and economic well-being, of elderly populations. Among the most important policy concerns relevant to health and longevity are the future fiscal viability of pension, health, and social insurance systems, both public and private, and the implications of these systems for savings and investment