VISCERA 27 



pearance of being the modified uppermost carti- 

 lage of the trachea. 



On the anterior margin of the thyroid cartilage 

 is the hyoid arch which supports the larynx and 

 connects it with the skull. To this arch the 

 tongue is attached. (See Page 8.) 



1 2. The Vocal Cords are two membranous folds 

 lying one on each side immediately below the false 

 vocal cords. 



13. The Trachea is the canal leading posteriorly 

 from the larynx to the lungs, as already seen. It 

 is kept expanded at all times by numerous cartilag- 

 inous rings which give it a characteristic appear- 

 ance. (Plate I., c.) 



14. The Thyroid Glands are two small, reddish 

 bodies situated on either side of the trachea, just 

 posterior to the larvnx. 



