Tonic function of respiratory muscles in passive changes of body position.
D001945:Breathing Exercises; D005260:Female; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology; D011187:Posture; D012119:Respiration / Q000187:drug effects; D012129:Respiratory Function Tests; D012143:Respiratory Physiological Phenomena
D009020:Morphine