What is the true role of surfactant in the lung?
D002617:Chemical Industry; D006801:Humans; D008168:Lung / Q000502:physiology*; D011650:Pulmonary Alveoli / Q000502:physiology*; D011663:Pulmonary Surfactants / Q000502:physiology*; D013500:Surface Tension; D013501:Surface-Active Agents; D014939:Work of Breathing
D011663:Pulmonary Surfactants; D013501:Surface-Active Agents