. The anatomy of the human body. Human anatomy; Anatomy. THE LARYNX. ' 427 membrane, and which pass from the anterior surface of the arytenoid cartilage to the corresponding margin of the epiglottis. In some animals, this ligament is replaced by muscular fibres. The Thyro-arytenoid Ligaments, or Chorda. Vocales.—Although there is no immediate relation between the thyroid and the arytenoid cartilages, they are united by four very important ligaments, named the chorda vocales, which require a special description. The chorda vocales are also called the vocal hands, the ligaments of Ferrein, or th
. The anatomy of the human body. Human anatomy; Anatomy. THE LARYNX. ' 427 membrane, and which pass from the anterior surface of the arytenoid cartilage to the corresponding margin of the epiglottis. In some animals, this ligament is replaced by muscular fibres. The Thyro-arytenoid Ligaments, or Chorda. Vocales.—Although there is no immediate relation between the thyroid and the arytenoid cartilages, they are united by four very important ligaments, named the chorda vocales, which require a special description. The chorda vocales are also called the vocal hands, the ligaments of Ferrein, or the thy- ro-arytenoid ligaments, because they have a ligamentous appearance, and extend from the retreating angle of the thyroid cartilage to the arytenoid cartilages. There are two vocal cords on each side, a superior {s,Jigs. 176, 178) and an inferior (r); the space between them is called the ventricle of the larynx (w), and the interval between the cords of the right and left sides is called the glottis {o,fig. 178).* I shall speak of these parts again presently. The inferior vocal cord (r, fig. 176) is much stronger than the superior, and has the form of a rounded tibrous cord, stretched horizontally from the retreating p,. ,-, angle of the thyroid cartilage to the anterior process of the arytenoid cartilage. It is free in all directions, excepting on the outside, where it is in contact with the thyro-arytenoid muscle. Its free portion is covered by the mucous membrane of the larynx, which adheres inti- mately to it, and is so thin that the white colour of the cord can be seen through it. This vocal cord is thinner than it appears at first sight, the projection which it forms being, in a great measure, due to the thyro-arytenoid muscle. Its structure is entirely ligamentous, and consists of parallel fibres, rimning from before backward, and not at all elastic! It is continuous below with the lateral thyro-cricoid ligament (d). The superior vocal cord (s) is smaller, and sit
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