'This hollow chamber of the upper end of the trachea contains the vocal cords'
the larynx
THE BODY HUMAN: This hollow chamber of the upper end of the trachea contains the vocal cords
This hollow chamber of the upper end of the trachea contains the vocal cords
This hollow chamber of the upper end of the trachea contains the vocal cords
THE BODY HUMAN
the larynx
THE BODY HUMAN