Click image to view full screen

There are two systems of veins in the extremities, superficial veins and deep veins. The superficial veins are found in the superficial fascia. The deep veins accompany arteries and occur deep to the investing fascia. There are anastomotic connections between the superficial and deep systems of veins.

Links and References:
Grant's: 6.4, 6.5, and 6.55
Netter (1ed.): 452 and 453 (2ed.): 448 and 449
Rohen/Yokochi: 384, 393, and 398