

THE TONGUE 



433 



general characters to the conical papillae, but the epithelial 

 cap at the apex of the cone is broken up into thread-like 

 processes. 



Muscles of the Tongue. The tongue is composed almost 

 entirely of muscular fibres, with some adipose tissue inter- 

 mixed. It is divided into two lateral halves by a median 

 septum, and the muscles in connection with each of these 



Stylo-hyoid 



Posterior belly' 

 of digastric 



Anterior belly of digastric Mylo-hyoid Genio-hyoid 

 FIG. 170. Muscles of the Tongue. (From Gegenbaur. ) 



consist of an intrinsic and an extrinsic group. 

 follows : 



They are as 



Extrinsic Muscles, 



I: 



Genio-glossus. 



Hyo-glossus. 



Chondro-glossus. 



Stylo-glossus. 

 Palato-glossus. 



T i. Superior longitudinal. 

 Intrinsic Muscles, *; Merior^longitudinal. 



I 4. Transverse. 



The extrinsic muscles take origin from parts outside the 

 tongue, and thus are capable not only of giving rise to changes 

 in the form of the organ, but also of producing changes in 

 its position. The intrinsic muscles, which are placed entirely 

 within the substance of the tongue, are, for the most part, 

 capable of giving rise to alterations in its form only. 



VOL. II -28 



