title: Space medicine in perspective. A critical review of the manned space program.
mesh_terms: D000222:Adaptation, Physiological; D001833:Body Temperature Regulation; D001842:Bone and Bones / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D003020:Clothing; D018504:Ecological Systems, Closed; D006321:Heart / Q000502:physiology; D006439:Hemodynamics; D006801:Humans; D008991:Monitoring, Physiologic; D009747:Nutritional Physiological Phenomena; D012119:Respiration; D012890:Sleep; D013026:Space Flight; D013686:Telemetry; D014481:United States; D014893:Weightlessness
chemical_list: D002118:Calcium