title: Cellular structure, function and organization in the lower respiratory tract.
mesh_terms: D000818:Animals; D001980:Bronchi / Q000166:cytology; D002196:Capillaries / Q000648:ultrastructure; D004847:Epithelial Cells; D006801:Humans; D007962:Leukocytes / Q000648:ultrastructure; D008168:Lung / Q000166:cytology; D008196:Lymph / Q000502:physiology; D008214:Lymphocytes / Q000648:ultrastructure; D008221:Lymphoid Tissue / Q000166:cytology; D008264:Macrophages / Q000648:ultrastructure; D008407:Mast Cells / Q000648:ultrastructure; D009092:Mucous Membrane / Q000648:ultrastructure; D009119:Muscle Contraction; D011650:Pulmonary Alveoli / Q000648:ultrastructure; D011663:Pulmonary Surfactants / Q000502:physiology; D012143:Respiratory Physiological Phenomena; D012137:Respiratory System / Q000166:cytology / Q000648:ultrastructure; D011984:Sensory Receptor Cells / Q000502:physiology; D014132:Trachea / Q000166:cytology
chemical_list: D011663:Pulmonary Surfactants