Vein

Vein

1. Any of a branching system of membranous tubes that carry blood to the heart. Most veins carry deoxygenated blood from the tissues back to the heart.
2. Geology. A regularly shaped and lengthly occurrence of an ore. Finding that vein of gold will make them rich.

Back to 5000 Word List 630
Shown is a diagram showing the veins carrying blood to the heart