The structure that contains the vocal cords., alveoli, bronchi, lungs, trachea, nose, mouth, What is this?, vein, alveoli, lung, trachea, This is also called the windpipe., bronchi, lungs, trachea, nose, mouth, What organ is this?, lung, bronchi, diaphragm, respiratory system, alveoli, nose, The muscle at the bottom of the lungs that is the main muscle used for breathing., lungs, trachea, diaphram, alveoli, respiratory system, The branches of air tubes within the lungs by which air passes through to the alveoli., alveoli, lungs, trachea, diaphragm, bronchi

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