Cigarette smoke and surfactant.
D000818:Animals; D001980:Bronchi / Q000502:physiology*; D004285:Dogs; D004391:Dust; D066298:In Vitro Techniques; D010743:Phospholipids / Q000096:biosynthesis; D011650:Pulmonary Alveoli / Q000502:physiology*; D011656:Pulmonary Emphysema / Q000209:etiology / Q000503:physiopathology; D012907:Smoking; D013500:Surface Tension
D004391:Dust; D010743:Phospholipids