AND PHYSIOLOGY. 



261 



the trachea, being of a little longer diameter than the trachea. 

 The Epiglottis is the most movable of all the vocal cartilages.- 



253. 



A Front View of the Cricoid Cartilage. 

 1, Its Internal Face. 2, The Cavity of 

 the Larynx as formed by this Cartilage. 

 3, Its Inferior Surface. 4, The little Head 

 or Convexity for Articulating with the 

 Arytenoids. 5, The Surface of the Su- 

 perior Edge for the Attachment of the 

 Lateral Crico-AryU-noid Muscles. 



It in shape resembles a cord- 

 ate or heart-shaped leaf, at- 

 tached by its apex to the up- 

 per edge of the glottis, and 

 has a wide range of motion, 

 in order to completely close 

 up the passage into the lungs, 

 cr leave a free communica- 

 tion between them and the 

 air. It also aids in deaden- 

 ing sounds, as it is suddenly 

 brought down upon the glot- 

 tis. All these cartilages very 



Fig. 259. 



A Lateral View of the Epiglottis Carti- 

 lage.- 1, Anterior or Convex Surface. 2, 

 Posterior or Concave Surface. 3, Superior 

 Margin. 4, Inferior Margin or Pedicle. 

 5, Its Sides. The Openings of the Muci- 

 parous Ducts are also shown. 



A Posterior View of the Articulations of the Cartilages of the Larynx. 1, Posterior 



Face of the Epiglottis. 2, Appendices of the Os Hyoides. 3, Its Cornua. 4, Lateral 

 Thyreo-Uyoid Ligaments. 5, Posterior Face of the Thyroid Cartilage. 6, Arytenoid 

 Cartilages. T, Cricoid Cartilage. 8, Crico- Arytenoid Articulation. 9, Posterior Crico- 

 Thyroid Ligament. 10, Cornu Minus of the Thyroid Cartilage. 11, Anterior Ciico- 

 TSiyroid Ligament. 12, Ligamentous Portion of the first King of the Trachea. 



