What passes through the vocal cord?

The vocal cords, or vocal folds, are located in the larynx and primarily allow for the passage of air during breathing and phonation. When air is exhaled from the lungs, it passes through the open vocal cords, causing them to vibrate and produce sound. Additionally, during swallowing, the epiglottis closes over the larynx to prevent food and liquid from entering the airway, ensuring that only air passes through the vocal cords.