The corniculate cartilage is actually two tiny conical nodules. They are made up of elastic yellow cartilage that exchanges information with the peaks of the arytenoid cartilages. These cartilages can be found in the posterior area of the aryepiglottic folds of the mucous membrane, and occasionally are connected with the arytenoid cartilages. They help the glottis open and close to assist with sound production.