In the circulatory system, veins (from the Latin vena) are blood vessels that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. Veins differ from arteries in structure and function; for example, arteries are more muscular than veins, veins are often closer to the skin and contain valves to help keep blood flowing toward the heart, while arteries carry blood away from the heart.
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Some articles on vein:
... test to determine valvular incompetence in superficial veins ... placed over the lower (distal) part of the vein being examined ... The upper (proximal) part of the vein is then tapped (percussed) ...
... Thrombophlebitis is an inflammatory condition of the veins related to blood clots. ...
... The suprascapular vein is a vein running above the scapula ... It empties into the external jugular vein ...
... Venous drainage usually mirrors colonic arterial supply, with the inferior mesenteric vein draining into the splenic vein, and the superior mesenteric vein joining the splenic vein to form the ...
... On his second day he found a vein, and staked it with another prospector, Alex Longwell ... Immediately thereafter he found a second vein, staking it for himself, while Longwell went off to stake another of his own ... The next year another $2,000,000 worth of ore was shipped, but the obvious surface veins were mined out ...
More definitions of "vein":
- (noun): Any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ.
- (verb): Make a veinlike pattern.
- (noun): One of the horny ribs that stiffen and support the wing of an insect.
- (noun): A blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood.
Synonyms: vena, venous blood vessel
- (noun): A distinctive style or manner.
Example: "He continued in this vein for several minutes"
Famous quotes containing the word vein:
“No man is quite sane; each has a vein of folly in his composition, a slight determination of blood to the head, to make sure of holding him hard to some one point which nature has taken to heart.”
—Ralph Waldo Emerson (18031882)
“As polishing expresses the vein in marble, and grain in wood, so music brings out what of heroic lurks anywhere. The hero is the sole patron of music.”
—Henry David Thoreau (18171862)