title: NATURAL HISTORY OF MUCUS IN THE BRONCHIAL TREE.
mesh_terms: D001980:Bronchi; D001991:Bronchitis; D006651:Histocytochemistry; D009093:Mucus; D009438:Neuraminic Acids; D010827:Physiology; D012106:Research; D013183:Sputum; D014197:Trees
chemical_list: D009438:Neuraminic Acids
keywords: BRONCHI; BRONCHITIS; EXPERIMENTAL LAB STUDY; HISTOCYTOCHEMISTRY; MUCUS; NEURAMINIC ACIDS; PHYSIOLOGY; SPUTUM