Tags: Disease.
Ageing (British English) or aging (American English) is the accumulation of changes in a person over time. Ageing in humans refers to a multidimensional process of physical psychological and social change. Some dimensions of ageing grow and expand over time while others decline. Reaction time for example may slow with age while knowledge of world events and wisdom may expand. Research shows that even late in life potential exists for physical mental and social growth and development.