Vein

:In geology, a vein is a regularly shaped and lengthy occurrence of an ore; a lode.

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In biology, a vein is a blood vessel which returns blood from the microvasculature to the heart. Veins form part of the circulatory system. The vessels carrying blood away from the heart are known as arteries.

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Veins have one-way valves to prevent back-flow caused by gravity.

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In systemic circulation de-oxygenated blood from the capillary blood vessels is taken by veins to the right part of the

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heart. Differently, in the pulmonary circulation oxygenated blood from the lungs is taken to the left part of the heart by pulmonary veins.

Geology: Geology (from Greek γη- (ge-, "the earth") and λογος (logos, "word", "reason")) is the science and study of the Earth, its composition, structure, physical properties, history, and the processes that shape it. It is one of the Earth sciences....

Ore: An ore is a mineral deposit containing a metal or other valuable resource in economically viable concentrations. Usually, it is used in the context of a mineral deposit from which it is economical to extract its metallic component. Ores are mined....

Lode: A lode is the metalliferous ore that fills a fissure in a rock or a vein of ore deposited between layers of rock....

Vein related Images and Photos (experimental)

Blocked Vein Brain Burst Aneurysm Cerebral Blood	Gears of War 3 Vein Omen Beanie Hat	Gears of War 3 Vein Omen Shooter Glass	Gears of War 3 Vein Omen Bottle Opener Key Chain
Red Blood Cells Erythrocytes in a Vein Showing their Biconcave Shape