VEIN

Vein

In the circulatory system, veins are blood vessels that carry blood toward 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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vein

Noun

  1. A blood vessel that transports blood from the capillaries back to the heart
  2. (used in plural veins) The entrails of a shrimp
  3. In leaves, a thickened portion of the leaf containing the vascular bundle
  4. The nervure of an insect’s wing
  5. A stripe or streak of a different colour or composition in materials such as wood, cheese, marble or other rocks
  6. A topic of discussion; a train of association, thoughts, emotions, etc.
    ...in the same vein...
  7. A style, tendency, or quality.
    The play is in a satirical vein.
  8. A fissure, cleft, or cavity, as in the earth or other substance.


The above text is a snippet from Wiktionary: vein
and as such is available under the Creative Commons Attribution/Share-Alike License.

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