886 



ORGANS OF SPECIAL SEXSE 



A special group forms an elongated mass, the gland of Nuhn, on either side of 

 the organ, and just beneath its tip. It occupies the groove between the genio-hyo- 

 glossus muscle and the inferior lingualis. 



Fig. 508.— The Fcetal Tuxoie. 



SUPESIOR APERTURE OF GLOTTIS 



POSTERIOR ROUNDED PORTION OF TONGUE 



LOWER PART OF PHARYNX 



FORAMEN C/ECUM 

 ■ GROOVE DIVIDING ANTERIOR AND POSTERIOR 

 PORTIONS OF TONGUE 



CIRCUMMLLATE PAPILL,€ 



Fig. 509.— Uxdek Surface of the Tongue with .Muscles. 



FR/ENUM LINGUA 



Lingualis inferior 



Hyo-glos8U8 



Genio-hyoid 



Mylo-hyoid, reflected 



Sterno-hyoid 



Lingualis inferior 



Genio-hyo-glossuB 



'- — Stylo-glossuB 

 Hyo-glossus 

 BODY OF HYOID BONE 

 Genio-hyoid 



THYROID CARTILAGE 



The mucous membrane of the posterior third of the tongue contains abundant 

 lymphoid tissue, collected into rounded masses. This often becomes much 

 developed, and gives to this part of the tongue an irregular nodular appearance. 



