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.
Larynx - Structure. 1  There are six cartilages, three unpaired and three paired, that support the mammalian larynx and form its skeleton. 2  Unpaired cartilages... 3  Thyroid cartilage: This forms the Adam's apple. 4  Cricoid cartilage: A ring of hyaline cartilage that forms the inferior wall of the larynx.