The retention of particles in large airways of the respiratory tract.
D000818:Animals; D001466:Barium Sulfate; D001980:Bronchi / Q000502:physiology*; D002923:Cilia / Q000502:physiology*; D005547:Foreign Bodies; D008297:Male; D009093:Mucus / Q000032:analysis; D051381:Rats; D014132:Trachea / Q000502:physiology*
D001466:Barium Sulfate