86 A MANUAL OF ANATOMY. 



by the platysma and deep cervical fascia which forms its 

 capsule. Behind are the posterior belly of the digastric, 

 the stylohyoid muscles, and the stylomaxillary ligament ; 

 in front, the anterior belly of the digastric ; below, the 

 tendon of the digastric, and the hyoid bone. 



Internally the gland lies upon the mylohyoid, hyoglos- 

 sus, and styloglossus muscles. The mylohyoid separates 

 the submaxillary from the sublingual gland. Around the 

 posterior border of the mylohyoid muscle a deep portion 

 of the submaxillary gland extends forward, and from this 

 deep portion the duct (Wharton's) passes forward and in- 

 ward to open in the floor of the mouth at the summit of a 

 small papilla at the side of the fraenum of the tongue. The 

 duct is about two inches long. Fig. 18. 



Relations about the Submaxillary Gland. The facial vein 

 and inframaxillary branch of the facial nerve cross the outer 

 surface of the gland. 



The facial artery deeply grooves the posterior and upper 

 portion of the gland. 



The submental branch of the facial artery and the mylo- 

 hyoid nerve run together along its upper border. 



Wharton's duct lies above the lingual nerve (which ac- 

 companies it to the tongue). 



Between the lingual nerve and gland lies the submaxil- 

 lary ganglion. 



The arterial supply is from the facial (submaxillary 

 branches) and lingual. 



The nerves are derived from the submaxillary ganglion, 

 mylohyoid, and sympathetic. 



For the submaxillary ganglion, see page 1 19. 



DISSECTION. 



Divide the tendon of the digastric on either side of the loop which binds it 

 to the hyoid bone, and the stylohyoid at its insertion. 



