SYSTEMATIC SYNTHESIS OF TISSUES INTO ORGANS. 343 



cons membrane, that blends with the skin at the edge of 

 the lips. FlG . 228. 



1018. THE TONGUE chiefly 

 constructed of different muscles, 

 as shown by Fig. 7, PI. 19, and 

 Fig. 228, is by some of them 

 attached to the lower jaw, the 

 hyoid bone, and the styloid pro- 

 cess of the temporal bone. 



1019. THE MUSCLES FORM- 

 ING THE TONGUE ABE COVERED 

 by mucous membrane, wrought 

 into numerous papillae of three 

 classes, and excavated into mu- 

 cous follicles along the side of 

 the base. 



1020. THE SALIVARY GLANDS are three in number, 

 upon each side, called parotid, sub-maxilary, and sub- 

 lingual. 



1021. THE PAROTID GLAND is the largest of the three, 

 situated and to be felt at the angle of the jaw, just in 

 front of the ear. (See Fig. 49.) Its outlet tube, that 

 may be felt like a cord beneath the skin, leads over the 

 masseter muscle, and opens at a little eminence percepti- 

 ble at the centre of the inside of the cheek. 



1022. THE PAROTID is CONSTRUCTED, like any race- 

 mose gland, of an immense number 1 of minute follicles, 

 clustered about small tubes, that all unite at last in one 

 duct (Steno's). The inner surface of the pouches and 

 tubes is composed of secretory tissue, the whole inter- 

 woven with nerves and capillaries, and bound together 

 with sinewy tissue. 



Remark. The duct (Steno's) might be described as commencing at 

 the inside of the cheek, and leading back beneath the outer skin to 

 the angle of the jaw, where it divides into many branches, about the 

 twigs of which many follicles are clustered, thus forming the parotid. 



1018. How construct ? 1019. How are ? 1020. What said of ? 1021. De- 

 scribe . 1022. How is - ? How otherwise describe parotid ? 



