Physiologic aspects of aging.
D000375:Aging; D002320:Cardiovascular Physiological Phenomena; D004702:Endocrine Glands / Q000502:physiology; D006801:Humans; D009142:Musculoskeletal Physiological Phenomena; D009424:Nervous System Physiological Phenomena; D012143:Respiratory Physiological Phenomena; D012679:Sense Organs / Q000502:physiology