lb The Anatomy of the Salivary Glands 



Flint, 1902; Spanner, 1937). Near the termination of the intra- 

 lobular ducts ring-shaped arterial arcades are formed from which 

 branches come off to supply the alveoli (Fig. 2.5). Embryologically 



Fig. 2.6. Double injection preparation of the vascular plexus around a duct 

 of the guinea-pig submaxillary gland. 



Arteries, black; veins, dotted; capillaries, hatched. Note the richness of the vascularisation 

 of the duct (Spanner, 1937). 



the ducts and their vessels develop before the alveoli and the ves- 

 sels of the alveoli. The capillary plexus around the acini is not very 

 dense compared with the rich vascularization of the ducts. The 

 formation of veins within the lobules follows the same general pat- 

 tern as that of the small arteries but the larger veins tend to drain 



