1. Life expectancy has increased significantly over the past century from 47 years to over 76 years due to control of infectious diseases and medical innovations. 2. Gerontology is the comprehensive study of aging while geriatrics focuses on diseases and problems of older adults. 3. Many body systems are impacted by aging including decreased function of the cardiovascular, respiratory, musculoskeletal and nervous systems. 4. Promoting healthy behaviors such as exercise, nutrition, social engagement and annual health screenings can help optimize health and functioning in older adults.