The respiratory muscles.
D000818:Animals; D003964:Diaphragm / Q000502:physiology* / Q000503:physiopathology; D005221:Fatigue / Q000209:etiology; D006801:Humans; D006935:Hypercapnia / Q000209:etiology; D007366:Intercostal Muscles / Q000502:physiology* / Q000503:physiopathology; D008168:Lung / Q000503:physiopathology; D010101:Oxygen Consumption; D012119:Respiration; D012120:Respiration Disorders / Q000209:etiology* / Q000503:physiopathology; D012131:Respiratory Insufficiency / Q000209:etiology / Q000503:physiopathology; D014939:Work of Breathing