. Roaring in horses (laryngismus paralyticus): its history, nature, causes, prevention, and treatment ... Horses; Roaring. Anatomy and Physiology of the Larynx. 89. Fig. 5.—diagram of a transverse section op the larynx of a medium-sized horse, through the thyroid, cricoid, and arytenoid cartilages and ventricles, immediately above the vocal cords, vs^ith the measurements op these parts. A, Front of larynx, or Pomum Adami of thyroid cartilage. B, Posterior part of larynx. C, Pars vocales. D, Pars respiratoria. 1, Thyroid cartilage. 2, 3, Left and right arytaenoid cartilages. 4, Bezel of cricoid - Stock Image