Geriatrics and Gerontology
Gerontology and geriatrics, scientific and medical disciplines, respectively, that are concerned with all aspects of health and disease in the elderly, and with the normal aging process. Gerontology is the scientific study of the phenomena of aging, by which is meant the progressive changes that take place in a cell, a tissue, an organ system, a total organism, or a group of organisms with the passage of time. Aging is part of the development sequence of the entire life span, from prenatal growth to senescence. Gerontology, however, is concerned primarily with the changes that occur between the attainment of maturity and the death of the individual and with the factors that influence these changes.