On the movement of mucus in the lung.
D002923:Cilia / Q000502:physiology; D004548:Elasticity; D006112:Gravitation; D006801:Humans; D008168:Lung / Q000502:physiology* / Q000648:ultrastructure; D008954:Models, Biological; D009093:Mucus / Q000166:cytology / Q000502:physiology*; D012123:Pulmonary Ventilation; D012212:Rheology; D014783:Viscosity