. A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . d,and the two aryte-noid cartilages are ofhyaline cartilage andliable to become with age, while the epiglottis and the four small car-tilages aie of a tibrous nature. the Thiiroid Citrtilage. the largest in the larynx, con-sists of two large (luadrilateral symmetrical jilates called ala, which unite an-teriorly at an angleof 85° to 95° andform the greaterpoition of the frontand sides of thelarynx. The alse presentan external flat-tened surface,niarkcd b
. A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . d,and the two aryte-noid cartilages are ofhyaline cartilage andliable to become with age, while the epiglottis and the four small car-tilages aie of a tibrous nature. the Thiiroid Citrtilage. the largest in the larynx, con-sists of two large (luadrilateral symmetrical jilates called ala, which unite an-teriorly at an angleof 85° to 95° andform the greaterpoition of the frontand sides of thelarynx. The alse presentan external flat-tened surface,niarkcd by a ratherindistinct obliqueline, running fromthe inferior tuber-cle at the lower an-terior border up-ward, outward, andbackward to the su-perior tubercle atthe posterior partof the superior bor-der. This ridgegives attachmentbelow to the sterno-thyroid, and aboveto the thyro-hyoidmuscle, and justbelow this line areattached a part ofthe inferior con-strictor of thepharynx and the stylo-pharyngeus. The internal sur-faces are more or less concave and smooth, and near theangle of union in front are attached the epiglottis, the. Tig. 3105.—Posterior View of the Cartilagesof the 1. Broad posterior arch ofthe cricoid : 3, internal surface of the alaof the thyroid; 3, arytenoid cartilage; 4,corniculum laryngis (cartilage of Santo-rini) ; 5, the posterior surface of the epi-glottis. (Luschka.)
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