The trachea extends from the larynx and branches into the two primary bronchi. Its laryngeal surface faces into the larynx. The epiglottis is a flap of elastic cartilage attached to the entrance of the larynx. The glottis is the opening between the vocal folds located in the larynx. The epiglottis sits at the entrance of the larynx. It can also occur with inflammation of the larynx and bronchi, known as croup. Hoarseness is often a symptom of problems in the vocal folds of the larynx. Laryngitis is inflammation of the larynx (voice box). The ability to roar comes from an elongated and specially adapted larynx and hyoid apparatus. These individuals have recurrent swelling in the extremities, genitals, face, lips, larynx or GI tract. Spasms of the larynx may rarely occur. Frogs create this sound by passing air through the larynx in the throat. Most commonly this involves injecting botulinum toxin into the affected muscles of the larynx. Glottal consonants are those produced using the vocal folds in the larynx. Precautions are taken to prevent seizures or larynx spasms.