1222 



THE ORGANS OF DIGESTION 



trates the septum and joins a like branch from the other side. The dorsalis linguae is a branch of 

 the lingual supplying the posterior part of the tongue, and rami from the tonsillar branch of 

 the facial go to the same region. A network of capillary vessels is placed beneath the epithelium. 

 The ranine veins lie to the side of the frenum underneath the mucous membrane. Each 

 ranine vein runs backward, superficial to and upon the Hyoglossus muscle and near to the 



Bristles 

 in ducts 

 of glands. 



Glands of 

 Blandin 

 or Nuhn. 



Lingual nerve. Ecmine artery. 



FIG. 941. Under surface of tongue, showing position and relations of gland of Blandin or Nuhn. (From 

 a preparation in the Museum of the Royal College of Surgeons of England.) 



hypoglossal nerve. The venae comites of the lingual artery usually join the ranine vein, and 

 the trunk opens into the internal jugular vein, but the vessels may open separately into the 

 jugular vein (Fig. 496). 



The Lymphatic Vessels of the Tongue (Fig. 559). The lymphatic vessels from the anterior 

 half of the tongue pass to the submaxillary lymph nodes. 



Lymph vessels from the posterior half of the tongue are connected with satellite nodes on 

 the Hyoglossus muscle and terminate in the deep cervical nodes. The last-named lymph 

 vessel accompanies the ranine vein. The lingual lymphatics arise from a network beneath the 



SUPERIOR 



LONGITUDINAL'S 



MUSCLE 



VCRTICALIS, 

 LINGUA: MUSCLE 



TRANSVERSUS 

 LINGU/E MUSCLE 



INFERIOR 

 LONGITUDINALIS 



MUSCLE 



STYLOGLOSSUS 

 MUSCLE 



DEEP LINGUAL 

 ARTERY 



SUBLINGUAL 

 GLAND 



GENIOGLOSSUS 

 MUSCLE 



FIG. 942. Frontal section through the body of the tongue of a newborn babe. X 3. (Spalteholz.) 



epithelium. Across the anterior two-thirds of the tongue there is little or no lymphatic con- 

 nection between the two sides; in the posterior one-third there is free connection, due to absence 

 of septum here. 



The Nerves of the Tongue (Fig. 943). The nerves of the tongue are five in number in each 

 half the lingual branch of the inferior maxillary division of the trigeminal, which is distributed 



