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HANDBOOK OF ANATOMY 



sists of several cartilages held together by muscles. The largest 

 the thyroid cartilage consists of two large plates of cartilage 

 joined at an angle in the middle line ; in the male this angle is 

 about 90 degrees, and projects forward, forming what is called 

 the "Adam's apple." Below the thyroid cartilage is the cricoid 

 cartilage, in shape like a signet ring with the narrow part in 

 front. The interval between the two can easily be felt in the 



Frontal Air-Sinus 



Superior Meatus 



Superior Concha 



' Spheno-ethmoidal Recess 



Inferior Meatus 

 Hard Palate (in section) ^TlCI 

 Tongue 



Mandible (in section) ._ 



Genio-hyo-glossus 



Genio-hyoid 



. Sphenoidal Air-Sinus 

 __ Middle Concha 



Middle Meatus 



Inferior Concha 

 .Eustachian Orifice 

 Salpingo-pharyngeal 



....Soft Palate 



Epiglottis 



.... Pharynx 



Ventricle of Larynx 

 Thyroid Cartilage 

 Cricoid Cartilage 



Trachea 



FIG. 51. THE PHAKYKX. 



(Esophagus 



living subject. The thyroid cartilage is joined by a strong 

 membrane to the hyoid bone, and from its inner side the 

 epiglottis, a cartilaginous process, projects upwards to the back 

 of the tongue. 



The Trachea is the continuation of the air passage ; it begins 

 just below the cricoid cartilage at the level of the sixth cervical 

 vertebra and ends at the fourth thoracic vertebra by dividing into 

 two bronchi. The trachea is a muscular tube kept permanently 



