title: Heart under unusual conditions: Effects of gravitation and chronic hypoxia.
mesh_terms: D000064:Acclimatization; D000400:Air Sacs / Q000502:physiology; D000531:Altitude; D000818:Animals; D001827:Body Height; D001835:Body Weight; D005426:Flight, Animal; D006112:Gravitation; D006321:Heart / Q000033:anatomy & histology; D006331:Heart Diseases / Q000503:physiopathology*; D000860:Hypoxia / Q000503:physiopathology*; D009206:Myocardium / Q000648:ultrastructure; D009336:Necrosis; D009929:Organ Size; D010802:Phylogeny; D005082:Physical Exertion; D013045:Species Specificity; D013550:Swimming; D014714:Vertebrates