+A **vein** is a type of blood vessel that carries [blood](/wiki/blood) from the body's tissues back towards the [heart](/wiki/heart). These vital conduits are an essential part of the circulatory system, often visible as bluish lines beneath the skin.
+## See also
+- [Artery](/wiki/artery)
+- [Capillary](/wiki/capillary)
+- [Circulation](/wiki/circulation)
... 1 more lines