title: Gas exchange in the immature lung. I. Anatomical shunt in the premature infant.
mesh_terms: D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008168:Lung / Q000196:embryology; D011650:Pulmonary Alveoli; D011652:Pulmonary Circulation; D012119:Respiration; D014692:Ventilation-Perfusion Ratio