Growing old. Increased surgical risks in the elderly.
D000368:Aged; D000375:Aging; D002320:Cardiovascular Physiological Phenomena; D006309:Hearing / Q000502:physiology; D006801:Humans; D007668:Kidney / Q000502:physiology; D012143:Respiratory Physiological Phenomena; D012306:Risk; D013312:Stress, Physiological / Q000503:physiopathology*; D013514:Surgical Procedures, Operative; D014785:Vision, Ocular / Q000502:physiology