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| Veins are blood vessels which carry deoxygenated blood from body tissues back to the heart and lungs. In the lungs the deoxygenated blood is reoxygenated through [[Gaseous exchange|gaseous exchange]] in the [[Alveoli|alveoli]].
| | See [[Vein|Vein]] |
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| '''The structure of Veins'''
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| Veins are made of thin walls of smooth muscle, and endothelial tissue<ref>https://www.mananatomy.com/basic-anatomy/veins 28/10/2017</ref>. They also contain valves, which assist in moving blood at low pressure against the force of gravity back to the heart, in order to be recirculated through the lungs.
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| <references /> https://www.mananatomy.com/basic-anatomy/veins, 28/10/2017
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Latest revision as of 09:24, 6 December 2017