1216 



THE RESPIRATORY SYSTEM 



anterior end of each ligament. The vocal ligaments enter into the formation of 

 the vocal folds (true vocal cords). 



Fig. 980. — ^The Larynx seen from the Left Side. (Modified from Luschka.) 



Epiglottis 



Hyoid bone 



Thyreo-hyoid muscle— j 



Thyreoid cartilage 



Median crico-thyreoid ligament 

 Crico-thyreoid muscle (straight part) 



Tracheal cartilage 



Internal laryngeal nerve 



.-—= — Hyo-thyreoid membrane 

 Superior laryngeal vein 



Superior laryngeal artery 



'-"'h i}j .Cricothyreoid muscle (oblique part) 

 V, — Posterior crico-arytaenoid muscle 

 Cricoid cartilage 



Trachea 



Fig. 98L — The Muscles and Ligaments of the Larynx seen from the Side. (The left 

 lamina of the thyreoid cartilage has been removed.) 



Epiglottis — 



Hyo-epiglottic ligament- 

 Body of hyoid 

 Fat mas! 

 Hyo-thyreoid membrane 



Thyreo-epiglottic muscle 

 Quadrangular membrane 



Thyreoid cartilage. 

 External thyreo-arytaenoid muscle 



Elastic cone 

 Lateral crico-arytaenoid muscle 

 Median crico-thyreoid ligament 



Cricoid cartilage 



■Ary-epiglottic fold 

 Ary-epiglottic ajid ary- 

 membranosus muscles 

 Cuneiform tubercle 

 Corniculate tubercle 



Oblique and transverse arytaenoid 

 muscles 



— Posterior crico-arytaenoid muscle 

 — Thyreoid articular surface 



Lamina of cricoid 



Inferior laryngeal nerve 



The median crico-thyreoid lip;ainorit is incised in the operation of laryngotomy. It is 

 crossed by the anastrxnotic arch of the crico-thyreoid arteries, which, however, can be avoided 

 in the operation by mal<ing a transvcr.se cut througli the ligament close to the superior margin 

 of the arch of the cricoid cartilage. 



