THE SALIVARY GLANDS 



94' 



Its superficial surface is liniitcd above Ity tin- root of tlio zygoma; lu'liind, l)v 

 the external auditory meatus, the mastoid process, and the sterno-mastoid muscle 

 with the posterior belly of the digastric; anteriorly, it extends for a varying dis- 

 tance over the masseter muscle; and lielow, it is liounded Ity a line passing from 

 the angle of the jaw backwards. 



It is enclosed in an aponeurotic capsule. The eapsule is continuous with tin; 

 deep cervical fascia and it is strengthened at the lower i)art of the gland, where it 

 extends from the styloid ])rocess to the angle of the jaw as the stylo-maxillary 

 ligament Avhich intervenes between the i)arotid and submaxillary glands. Above 

 ili<^ cai)sule is attached to the lower margin of the tympanic ])lat(M»f the temporal 

 bone and to the posterior l)ordcr of the Glasserian fissure. 



The gland is somewhat prismatic in form, j)ossessing three borders and sin-faces 

 and two extremities. The outer surface is covered by fascia and skin and in the 

 lower part of its extent by platysma. Embedded in it are several superficial lym- 

 l)hatic glands which receive afferent vessels from the temple, cheek, eyebrows, eye- 



Fio. 559. — The Salivaky Glands. 



PAROTID GLAND 



Maaseter muscle 



SOCIA PAROTIDIS 



DUCT OF SOCIA 

 PAROTIDIS 



DUCT OF PAROTID 



Bristle inserted 

 into duct 



Fraenuiu linguae 



DUCT OF RIVINUS 



SUBLINGUAL GUNO 



DUCT OF SUBMAXILLARY 

 GLAND 

 Mylo-hyoid muscle 



Anterior belly of 

 digastric muscle 



DEEP PORTION OF SUBMAXILLARY GLAND 



Sterno-mastoid 

 muscle 



Posterior belly of 

 digastric muscle 



SUBMAXILLARY GLAND, 

 DRAWN BACKWARDS 



Loop of fascia 



lids, and from the outer aspect of tlio "pinna. The ])osterior surface is in relation 

 with the posterior belly of the digastric, the styloid i)rocess, the styloid group of 

 muscles, the mastoid i)rocess, and the ])Osterior auricular artery. A backward 

 process of this surfaci; which embraces the styloid jiroeess and insinuates itsc^lf be- 

 tween the carotid arteries is known as the carotid lobe. The anterior surface is in 

 contact with the posterior border of the ramus of the jaw by which it is grooved 

 and with the internal pterygoid nuiscle. It sends forwards an irregular process, 

 the ])terygoid lobe, l)etween the jitervgoid muscles. The anterior border is irregu- 

 lar and thin; it extends forwards for a variable distance over the masseter nmsde, 

 the duct and several branches of the facial nerve emerge from it. and in front of it, 

 above the duct, there is a small se]iarate lobe, the socia })arotidis. The jiosterior 

 border is in relation below with th(? sterno-mastoid, and altove with the mastoid 

 process. The internal l)order is separated fnnn the wall of the jtharynx l)y the 

 carotid vessels, the internal jugular vein, and the ninth, tenth, and eleventh cranial 

 nerves. The u])per extremity lies in tlie posterior jtart of the glenoi<l ftissa of the 



