title: Adaptive variation in the mammalian respiratory system in relation to energetic demand.
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D002196:Capillaries / Q000502:physiology; D008322:Mammals / Q000502:physiology; D009132:Muscles / Q000098:blood supply / Q000502:physiology; D010100:Oxygen / Q000097:blood; D010101:Oxygen Consumption; D011659:Pulmonary Gas Exchange; D012143:Respiratory Physiological Phenomena; D013045:Species Specificity
chemical_list: D010100:Oxygen