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2015-05-23T17:05:02+08:00

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Blood vessels are pathways of blood. They comprise of three kinds which are veins, arteries, and capillaries.
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2015-05-23T17:05:34+08:00

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Blood vessels serves as pathways of blood so that they can reach to the heart, to change to oxygenated blood and distribute to other parts of the body. Hope this helps =)
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