title: Alveolo bronchiolar transport; observations and hypothesis of a pathway.
mesh_terms: D000403:Airway Resistance; D001980:Bronchi / Q000502:physiology*; D004391:Dust; D006801:Humans; D008264:Macrophages; D010587:Phagocytosis; D011650:Pulmonary Alveoli / Q000502:physiology*; D012119:Respiration
chemical_list: D004391:Dust