208 MANUAL OF PHYSIOLOGY. 



with closely set valves, which prevent the fluid it contains from 



FIG. 94. 



Diagram showing the Course of the Main Trunks of the Absorbent Sys- 

 tem; The lymphatics of lower extremities, etc., meeting the lacteals of in- 

 testines at the receptaculum ohyli (R. c.), which opens into the thoracic duct. 

 The superficial vessels are shown in the diagram on the left arm and leg 

 (s.), and the deeper ones on the arm to the right (D.). The glands are here 

 and there shown in groups. The small right duct opens into the veins on 

 the right side. The thoracic duct discharges into the union of the great 

 veins of the leftside of the neck (T.). 



being forced backwards, so that any accidental local pressure exer- 

 cised on the exterior of a lymph channel helps the fluid onwards 



