THE MOUTH, ORAL OR BUCCAL CAVITY 257 



The Salivary Glands. There are three pairs, 

 parotid, submaxillary, and sublingual. 



The parotid gland, the largest, weighs J to 1 ounce, 

 and lies on the face below and in front of the ear. Its 

 outer surface, lobulated, is covered by the skin and 

 fascia, and partly by the platysma and several lym- 

 phatic glands. 



FIG. 97 



The salivary glands. (Gray.) 



The duct (Stenson's) is about 2J inches long and f 

 inch in diameter, and opens opposite the second 

 molar tooth, into the mouth, thence runs backward 

 beneath the mucous membrane, through the buccina- 

 tor, and across the masseter to the front of the gland. 

 It conveys the saliva to the mouth. 



The submaxillary gland is of an irregular form, weighs 

 about 2 drams, and lies below the jaw and above the 

 17 



