. The anatomy of the domestic animals. Veterinary anatomy. CAVITY OF THE LARYNX 521 The ventricularis rotates the arytenoid so as to bring the apical part of the cartilage do'mi- ward and forward. In some cases there is a small thyro-arytenoideus extemus muscle which arises from the medial face of the lamina of the thyroid cartilage near the dorsal border, passes upward and backward, and blends with the arytenoideus transversus. Cavity of the Larynx The cavity of the larynx (Cavum laryngis) is smaller than one would naturally expect from its external appearance. On looking into it through the
. The anatomy of the domestic animals. Veterinary anatomy. CAVITY OF THE LARYNX 521 The ventricularis rotates the arytenoid so as to bring the apical part of the cartilage do'mi- ward and forward. In some cases there is a small thyro-arytenoideus extemus muscle which arises from the medial face of the lamina of the thyroid cartilage near the dorsal border, passes upward and backward, and blends with the arytenoideus transversus. Cavity of the Larynx The cavity of the larynx (Cavum laryngis) is smaller than one would naturally expect from its external appearance. On looking into it through the pharyngeal end two folds are seen projecting from each lateral wall. These are termed the. Fig. 404.—Part of .S.\gittal Section of Head of Horse. Section is cut just to left of median plane. 1, Epiglottis; 2, body of thyroid cartilage; 3, arytenoid cartilage; 4. 4', lamina and arch of cricoid cartilage; 5, ary-epiglottic fold; 6, vocal cord (labium vocale); 7, ventricular fold or false vocal cord (plica ventricularis); S, lateral ventricle of larynx: 8', dotted line indicating contour of laryngeal saccule; 9, middle ventricle of larynx; 10, m. crico- arytenoideus dorsalis; 11, oesophagus; 12, septum of areolar tissue between guttural pouches; 13, m. rectus capitis ventralis; 14, body of sphenoid bone; 15, pharyngeal recess; 16. arrow points into nasal cavity; 17, pharyngeal open- ing of auditive or Eustachian tube; IS, posterior pillars of soft palate united over aditus cesophagi; 19, arrow points into vestibule of larynx: 20, soft palate; 21, tonsil: 22, root of tongue: 23, m. hyo-epiglotticus; 24, hyoid bone; 25, mandibular lymph glands; 26, mm. omo-hyoideus and sterno-hyoideus; A, vestibule of larynx; B, glottis; C, post- glottic part of larynx; D, trachea; E, pharynx, F, isthmus faucium. vocal cords, and the narrow part of the cavity between them is the ritna glottidis. Thus it is convenient to recognize three divisions of the cavity. The aditus laryngis, or pharyngeal ap
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