Explains how human lungs and the respiratory system work, including information on the trachea, the bronchi, the diaphragm, and the vocal cords.

Your body -- All about the lungs -- Breathe in -- Hot and humid -- The windpipe -- Totally tubular -- Passing gases -- Making energy -- What a waste -- Breath rate -- Breathe out -- Full of hot air -- Vocal motion -- Sing it loud -- Make a lung.