1108 



DIGESTIVE SYSTEM 



masses of lymphoid tissue. The sulcus terminalis forms a fairly sharp boundary 

 between the h^mphoid mucosa of the root and the papillated mucosa of the body 

 of the tongue (fig. 854). 



Fig. 855. — Left Side of the Tongue, with its Muscles, etc. 



Stylo-glossus 

 Dorsum of tongue 



Genio-glossus 



Genio-hyoid 



Epiglottis (indicated by dotted lines) 



Greater comu of hyoid 1)006 



Styloid process 

 Stylo-hyoid 



Hi i Root of tongue 



Stylo-pharyngeus 



Hyo-glossus 



Thyreo-hyoid 



ligament 

 Cartilago triticea 



Thyreo-hyoid 

 membrane 



Thyreoid cartilage 



Median portion of 

 crico-thyreoid 

 membrane 



Cricoid cartilage 



First ring of 

 trachea 



Glands. — ^The glands of the tongue are of three types — mucous, serous and mixed — and 

 are distributed as shown in fig. 860. The most numerous are those of the mucous type, which 



Fig. 856. — Section of Lingual Papill.®. X 20. (From Toldt's Atlas.) 



■ Stratified epithelium 



•-•- Secondary papillce 



Conical papilla 



.- Filiform papillae 

 • Capillary vessels 



— Artery 



— Vein 



■■' Lamina propria 

 -- - Fascia linguee 



.... Tongue muscle 



are typical for the mouth cavity in general and resemble those already described in the lipH, 

 cheeks and palate. They are spread over the entire surface of the root of the tongue, in the 



