ORGANS OF INSALIVATION. 299 



tory ducts that one common duct is formed, whose office 

 is to carry the saliva, furnished by these glands, into the 

 mouth. 



A FIG. 85. B 



These salivary glands are developed from the mucous 

 membrane of the mouth, which being reflected in the form 

 of a tube, sends off bud-like processes whose ultimate ter- 

 minations constitute the follicles just described. 



1. The Parotid. 



Dissection. This gland, so called from its situation 

 about the ear, (^apa, near, or$ <*tof t the ear,) is brought to 

 view by the same dissection, for exposing the organs of 

 prehension. It is covered by a dense fascia, the fascia 

 superficialis, continued from the neck, which sends down 

 into its substance numerous processes which serve to sep- 

 arate its granules, and conduct to it its blood-vessels. This 

 fascia must be separated from its strong attachment to the 

 cartilaginous portion of the meatus externus, and removed, 

 when the parotid will be fairly exposed. It presents a 

 pale, rough, granulated surface, and is the largest of the 

 salivary glands. It has no regular figure, but occupies the 

 space reaching from the zygoma above, to the angle of the 

 jaw below ; and from the mastoid process and sterno-cleido 

 mastoid muscle behind, to a short distance over the mas- 

 seter muscle in front while in depth, it passes behind the 



FIG. 85, A represents the Salivary Glands. 1 Parotid gland, 2 Duct of 

 Steno, 3 Submaxillary gland, 4 Duct of Wharton or submaxillary duct, 5 

 Sublingual gland. 



FIG. 85, B represents a lobule of the parotid gland of a new-born infant 

 injected with mercury magnified fifty diameters. 



