1268 



A MANUAL OF ANATOMY 



and is in communication with the nasal fossae and Eustachian 

 tubes. It also communicates with the lower region by means of 

 the pharyngeal isthmus. The lower region is subdivided into two 

 parts, buccal and laryngeal. The buccal part is limited above by 

 the soft palate, and below by the superior aperture of the larynx, 

 and it communicates with the buccal cavity through the isthmus 

 faucium. The laryngeal part is situated behind the larynx, with 

 which it communicates, as Well as with the oesophagus inferiorly. 



Naso-pharynx. — This is entirely respiratory in function, and is 

 consequently always pervious. It is bounded in front by the 



Eustachian Cushion 



Posterior Border 

 of the Vomer 



! Right Posterior Naris 



/ Levator Palati 



Salpingo- 

 pharyngeus 



Azygos Uvulae 



Tensor Palati 



- Internal Pterygoid 

 . Uvula 



- Root of Tongue 



— Epiglottis 



_ Wall of Pharynx 



Sinus Pyriformis 

 — Arytanoideus Obliquus 

 — Arytaenoideus Transversus 



Crico-arytaenoideus 

 Posticus 



CEsophagus 



Fig. 522. — The Pharynx opened from behind. 



posterior nares and the posterior border of the vometr ; behind, by the 

 vertebral column; above, by the basilar process of the occipital 

 and part of the body of the sphenoid ; and below by the soft palate, 

 which can be elevated and depressed. Four openings communicate 

 with the naso-pharynx. The anterior wall presents the oval 

 openings of the posterior nares leading from the nasal fossas, and: 

 separated from each other by the posterior border of the vomer. 

 Each opening in the recent state measures about i inch from above 

 downwards, and about \ inch from side to side. Through it, on 

 the outer wall of the corresponding nasal fossa, are seen the posterior 

 parts of the inferior turbinate bone and the inferior turbinate 



