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.
The larynx, also known as the voice box, is the upper group of structures of the lower airway and opens with a number of cartilaginous structures. From anterior to posterior, these structures include the base of the epiglottis, the thyroid cartilage, and the aryepiglottic folds (Figure 20-5b and Figure 20-5c).