title: Gas exchange in the immature lung. II. Method of estimation and maturity.
mesh_terms: D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D004285:Dogs; D006801:Humans; D009584:Nitrogen; D010100:Oxygen; D011650:Pulmonary Alveoli / Q000502:physiology; D011652:Pulmonary Circulation; D012119:Respiration; D012129:Respiratory Function Tests; D012756:Sheep; D014692:Ventilation-Perfusion Ratio
chemical_list: D009584:Nitrogen; D010100:Oxygen