Hair Tonic: What It Is And How To Use It. Hair tonic is an âold schoolâ hair styling product. It makes the hair look glossier (though some say greasier), something which many people viewed as a sign of healthy hair. The oils in the hair tonic also help hold the hair in place, making it easier to style, much like mousse or hair spray.
Larynx. the complex of cartilages, muscles, and ligaments that form the initial section of the trachea in terrestrial vertebrates and man, usually containing the vocal apparatus. The laryngeal cavity is divided into the anterior larynx, or vestibule, and the posterior larynx.
Despite its name, the thyroid cartilage has nothing to do with the thyroid gland or its processes. It plays a role in the production of the human voice, providing protection and support for the vocal folds.The muscles of the larynx act on skeletal structures, including the thyroid cartilage, to produce the vibration of the vocal folds, which is necessary to produce vocalization.Cartilage is a strong but flexible tissue.) It houses the vocal folds, also known as the vocal cords. The thyroid cartilage is composed of two plates, called laminae, that join in the front at an angle of 90 to 120 degrees.