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A 45-year-old member asked:

I was wondering what are the main difference between the artery and the vein?

1 doctor answer1 doctor weighed in
Dr. Sonja Stiller-martin
Emergency Medicine 26 years experience
Structure and action: arteries have thicker, muscular walls. They carry oxygen and nutrients out to the body so it can be used. Veins are thin walled, elastic vessels that carry 'used' blood (less oxygen and waste products of metabolism) back to the body and heart.

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Last updated Jun 24, 2014
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