The larynx, also called voice box, is a small segment of the airway that links the laryngopharynx and the trachea. “The interior of the larynx is lined with mucous membrane” (Jardins, 2013). The larynx is positioned in the front of the neck, inferior to the hyoid bone and higher to the trachea. The larynx contains structures known as vocal folds that allow the sounds to be produced. The larynx also allows the air to pass between pharynx and trachea. It also guards against aspiration of material that does not belong in the lungs. Larynx also has another vital function of Valsalva’s maneuver where effort is required during exhalation epically during physical work. The larynx makes up its structure with many cartilage structures. “The epiglottis
