Old age consists of ages nearing or surpassing the life expectancy of human beings, and thus the endШУУД ҮЗЭХ and
Old age consists of ages nearing or surpassing the life expectancy of human beings, and thus the end of the human life cycle. Euphemisms and terms for old people include, old people (worldwide usage), seniors (American usage), senior citizens (British and American usage), older adults (in the social sciences), the elderly, and elders (in many cultures —including the cultures of aboriginal people). Old people often have limited regenerative abilities and are more susceptible to disease, syndromes, and sickness than younger adults. The organic process of ageing is called senescence, the medical study of the aging process is gerontology and the study of diseases that afflict the elderly is geriatrics. The elderly also face other social issues such as retirement, loneliness, and ageism. The chronological age denoted as old age aries culturally and historically. Thus, old age is "a social construct" rather than a definite biological stage Old age comprises the later part of life; the period of life after youth and middle age . . . , usually with reference to deterioration When old age begins cannot be universally defined because it shifts according to the context. The United Nations has agreed that 60+ years may be usually denoted as old age, and this is the first attempt at an international definition of old age. However, for its study of old age in Africa, the World Health Organization (WHO) set 50 as the beginning of old age. At the same time, the WHO recognized that the developing world often defines old age, not by years, but by new roles, loss of previous roles, or inability to make active contribution to society.
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