Physiologic changes with aging.
D000273:Adipose Tissue / Q000502:physiology; D000328:Adult; D000368:Aged; D000375:Aging; D000818:Animals; D001823:Body Composition; D001835:Body Weight; D002319:Cardiovascular System; D004068:Digestive System Physiological Phenomena; D004702:Endocrine Glands / Q000502:physiology; D006801:Humans; D007668:Kidney / Q000502:physiology; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000502:physiology; D009424:Nervous System Physiological Phenomena; D051381:Rats; D012119:Respiration