84 ELEMENTARY PHYSIOLOGY. 



As ID the case of the blood-vessels, 

 Vesse^Tand wn i c h are the beginnings of the portal 

 Lymphatic circulation, so the lacteals unite and 



finally form the thoracic duct (10). 

 Just as small creeks flow together and form larger 

 streams, so the lacteals form chyliferous vessels, 

 which are shown here at (7) on the Anatomical Aid. 

 These vessels carry the chyle absorbed by the lac- 

 teals through numerous glands called lymphatic 

 glands (6), and finally empty it into the chyle recep- 

 tacle, which is seen here at (9). 



The chyle receptacle is a sac-like expan- 



Thorarie g | ou Q ^ l ower en( J o f t } ie tJ lorac i c 



JLPUft. 



duct, which is about as large as a slate 

 pencil or goose quill. The direction in which it 

 carries the chyle is very plainly seen by referring to 

 the Aid. It passes upward in front of the spinal 

 column and behind the oesophagus (2). At its upper 

 end it bends forward and downward, something like 

 the crook of a walking cane, and pours its contents 

 into the left subclavian vein. From this point the 

 chyle passes into the innominate vein (14), and then 

 through the upper vena cava (15) into the right 

 auricle of the heart. 



Thus we have traced the different sub- 

 Been Done. 



What Has stances of which the digestive food 



is composed by different routes to the 

 same cavity of the heart, there to mingle with each 

 other, and with the impure blood collected from all 



