[On the function of respiratory tract fluid in the mucociliary transport system (author's transl)].
D000818:Animals; D001001:Anura; D002923:Cilia / Q000502:physiology*; D006801:Humans; D009093:Mucus / Q000502:physiology*; D013183:Sputum; D014132:Trachea / Q000502:physiology*