DIGESTION 



231 



grapes (fig. 79) being represented by the ducts, and the grapes themselves 

 by the follicles or secreting parts. Many such ducts meeting together 



Fig. 77.— Salivary Glands 



1 Submaxillary gland. - -' Submaxillary duct (Wharton's duct). 3 Cluster of openings of ducts of 

 sublingual glands. 4 Tongue. 5 Circumvallate papilla. 6 Fungiform papillse. ~ Jugular vein. 



8 Submaxillary vein. 



form the principal salivary duct, which is single in the case of the parotid 



gland, opening on the inner side 

 of the cheek, whilst in the case of 

 the submaxillary gland it opens 

 on either side of the tongue on 





1 Secreting cells lining a lobule. : Central .-pa.v i 

 which the secretion is poured. 3 Dark cells forming 



.K.-iuiliiiH.'s uf < Jianauzzi. 



the floor of the mouth. The ducts of the sublingual gland are numerous, 

 and discharge their contents into the mouth beneath the tongue. 



