Anatomy and Physiology of the Larynx. 91 



borresponding to the elevation of the arytenoid carti- 

 lages, and for this reason Ludwig has termed them " posi- 

 tion cartilages" {SteUknor2}el). The larger the volume 



Fig. 6. — view of the horse's larynx during laboured inspira- 

 tion, SEEN FROM THE MOUTH. 



The vocal cords, c c, and arytsenoid cartilages, b b, being drawn up- 

 wards and outwards to the utmost degree, so as to widen the glottis, 

 d, as much as possible, for the ingress of air to the trachea, e e, En- 

 trance of the ventricles closed. 



of air required, the more space must be allowed for its 

 entrance, and the width of this space will depend upon the 

 energy and activity of the abductor or dilator muscles, as 

 they may be termed, which elevate these cartilages. When 



