The veins are the centripetal vessels of the circulatory system. these make venous system.
The veins may be divided into superficial and deep. The superficial veins of the body form an extensive network, lie immediately under the skin and are mostly unassociated with the arteries. The deep veins are placed deeply and are accompanied by the arteries.
The anastomoses formed by the vessels of the venous system are larger, more frequent and complicated than those of the arterial system.
Numerous such anastomoses give raise to the formation of the venous plexuses.
Most of the veins are the satellites of the arteries and need no special description.
Therefore, only few important venous distributions, which under go independent courses, will be discussed here.
