What are the holes in the cartilages of the throat called?

The airway: There are three major cartilage structures in the throat: the laryngeal or thyroid cartilage, the cricoid cartilage and the epiglottis. The epiglottis doesn't have any holes in it. In fact, when you swallow, it covers the larynx and protects the the airway, the "hole." The thyroid cartilage houses the voice box and includes the epiglottis. The cricoid is just below the larynx.