98 EQUINE ANATOMY. 



arteries. 4 — Nerves : glosso-pharyngeal, pneumo-gas- 

 tric, great sympathetic. 



Larynx* — Structure : five cartilages. 1 — Cricoid, 

 with an external face, presenting two conca^'e articular 

 f acettes, and an internal face smooth ; a superior and in- 

 ferior circumference ; 2 — Thyroid. Division : A body 

 and two wings, the superior border of which presents 

 a mean of articulation with the hyoid and a notch for 

 the superior laryngeal nerve ; 3 — Epiglottic, with 

 two faces, two borders, a summit and a base, the bor- 

 ders having prolongations or cartilages of Wrisberg 

 extending backwards ; 4 — Arytenoid, two, whose exter- 

 nal face is divided by a ridge in two portions ; superior 

 and anterior borders unite with their congeners ; pos- 

 terior border projects into the larynx ; and inferior 

 gives attachments to the vocal cord. 



Articulations. — 1 — the thyroid cartilage to the 

 hyoid bone, by the extremities of the cornua and 

 through the medium of the thyro-hoid membrane ; — 2 

 the thyroid and cricoid cartilages by two small arthro- 

 dia and the crico-thyroid membrane ; 3 — the two ary- 

 tenoids by their superior borders; 4 — the arytenoid 

 and the cricoid cartilages by small movable arthrodia ; 

 5 — arytenoid to the thyroid by the vocal cords ; 6 — 

 the epiglottic to the thyroid cartilages by amphiar- 

 throsis ; T — the epiglottic to the arytenoids by the 



