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.
allergen Alzheimer's disease American Heart Association Arachis hypogaea breast cancer business enterprise cancer cardiovascular system disease chronic condition construction dementia disability disease employment food allergy Gastrointestinal tract gut flora Health and Safety Executive Health IT health professional hepatocellular carcinoma Hospital infection inflammation injury insurance liver marijuana mental disorder mental health neoplasm occupational safety and health officer opioid pain patient research safety student Surgery symptom type I hypersensitivity United States of America woman Workers' compensation