The glottis is the part of the larynx that contains the vocal cords and the opening between them. It plays a crucial role in producing sound when we speak or sing. When air from the lungs passes through the glottis, it causes the vocal cords to vibrate, creating sound waves. In addition to sound production, the glottis also helps regulate airflow during breathing. It can open and close to control the amount of air entering the trachea and lungs. This function is essential for both communication and respiration, making the glottis an important component of the respiratory system.