The type of aging that refers to normal, age-related biological changes is known as primary aging. This involves natural physiological changes that occur over time. In contrast, secondary aging is influenced by external factors and lifestyle choices.
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Primary aging involves natural biological changes associated with aging, such as reduced elasticity of the skin and decreased muscle mass. It is distinguished from secondary aging, which is influenced by lifestyle and environmental factors. Understanding these differences is crucial in the study of gerontology and health science. ;