686 



THE BLOOD-VASCULAR SYSTEM 



communicates with a plexus of veins upon the posterior and lateral regions of the thigh and 

 with the great saphenous. In many cases the small saphenous vein is entirely drained, by means 

 of the femoro-popliteal, into the great saphenous. Under these circumstances the usual place 

 of termination of the small saphenous is marked by a small vein opening into the popliteal. A 

 small offshoot from the inferior sural branch of the popliteal artery accompanies this vein for a 



Fig. 539. — The Veins of the Dorsum of the Foot. (After Toldt, "Atlas of Human Anat- 

 omy," Rebman, London and New York.) 



Great saphenous vein — - 



"" Anterior tibial artery 



Anterior tibial muscle 



Dorsal pedal artery and vein 



Extensor hallucis longus tendon- 



Dorsal venous arch — 



Dorsal digital vein — 



,i— -Anterior tibial veins 



Dorsal venous rete of foot 



,— jaDorsal metatarsal arteries 



-Dorsal metatarsal veins 



short distance down the back of the calf. The small saphenous vein contains from nine to 

 twelve valves. 



II. THE DEEP VEINS OF THE LOWER EXTREMITY 



The deep veins of the lower extremity accompany the arteries, and have 

 received corresponding names. From the foot to tlic knee there are two veins to 

 each artery. These veins run on either side of the corresponding artery, and com- 



A^\ 



