. Diseases of the nose and throat . Fig. 47.—Anterior aspect of the larynx and trachea. H, Hyoid bone;E, Epiglottis; TH, Thyrohyoid membrane; T, Thyroid cartilage; C,Cricoid cartilage; CT, Cricothyroid membrane and muscle; TG, Thyroidgland; IT, Isthmus of thyroid. THE CARTILAGES There are five principal cartilages. The thyroid cartilage presents two wings joined at an 250 ANATOMY AND PHYSIOLOGY OF THE LARYNX 251 angle anteriorly. The posterior borders project upwardforming the superior cornua for the insertion of the thyro-hyoid ligament, and downward forming the inferior cornuawhich articulat
. Diseases of the nose and throat . Fig. 47.—Anterior aspect of the larynx and trachea. H, Hyoid bone;E, Epiglottis; TH, Thyrohyoid membrane; T, Thyroid cartilage; C,Cricoid cartilage; CT, Cricothyroid membrane and muscle; TG, Thyroidgland; IT, Isthmus of thyroid. THE CARTILAGES There are five principal cartilages. The thyroid cartilage presents two wings joined at an 250 ANATOMY AND PHYSIOLOGY OF THE LARYNX 251 angle anteriorly. The posterior borders project upwardforming the superior cornua for the insertion of the thyro-hyoid ligament, and downward forming the inferior cornuawhich articulate with the cricoid cartilage. The cricoid cartilage, so called because it is shaped likea seal ring, is narrow in front and broad behind. To its. Fig. 48.—The cartilages of the larynx. E, Epiglottis; T, Thyroid;W, Cartilages of Wrisberg; S, Cartilages of Santorini; A, Arytenoids;C, Cricoid. Insertions, c, Vocal cords, t, thyroarytenoid muscles; a, aryte-noideus; ca, lateral and posterior cricoarytenoid muscles; p, originof the posterior cricoarytenoid muscles. lower margin the trachea is attached. Upon the uppersurface of the broad, posterior portion are placed the aryte-noid cartilages. Anteriorly the space between it and thethyroid cartilage is closed by the cricothyroid two arytenoid cartilages are roughly three-sided 252 DISEASES OF THE NOSE AND THROAT^ pyramids with their bases resting upon and articulatingwith the cricoid. At the apex is attached the aryepiglotticfold within which and just above the arytenoids are thesmall sesamoid cartilages of Santorini and Wrisberg. Atthe anterior angles or vocal processes the vocal cords areattached. By their motion the glottis opens and shuts, Fig. 49.—Lateral view o
Size: 1032px × 2421px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectnose, bookyear1915
