282 



The Ducts of the Human SuhmaxiUarv Gh^nd 



intraloljular ducts, can be easily seen. The rchitions of the ducts to 

 these structures are likewise sharply defined so that one obtains by the 

 use of the stereoscopic microscope the relations of the vascular and 

 secretory units to the frame-work and the structures of the gland. In 

 these specimens the interlobular septa and their relation to the capsule 

 can be easily determined. The larger ducts and vessels in the inter- 

 lobular septa are readily folloAved, owing to the difference in ditfrac- 



'FiG. 4 — Piece digestion of doff s submaxillary. Magnified 10 diameters. This speci- 

 men shows the sui^lobular interspaces and the passage of lobnlar ducts and connec- 

 tive tissue from the interspace into the lobule through its hilus. The relation of the 

 membrana limitans to other lobules is shown as clearly in this specimen as in figure 8. 

 The course of the intralobular ducts is plain as they pass through the fine supporting 

 meshwork formed by the basement membranes of the alveoli. J., Sublobular inter- 

 space with artery, duct, and veins; i)/, Membrana limitans; C, Capsule. 



tion between them and the frame-work of other portions of the organ. 

 The ducts, vessels, and septa appear in these specimens, Avhen viewed 

 by transmitted light, considerably darker than the fine lobular frame- 

 Avork in which they run and they can be easily distinguished from each 

 other by their size. The ducts are considerably larger than either of 

 the vasa comites which run in the same interspace. Embracing the 



