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25-01-2017
Biology

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What structures of the circulatory system carry blood containing carbon dioxide from the body back to the heart ?

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xxxCaitlynxxx xxxCaitlynxxx

25-01-2017

The lungs. The left and right ventricle I believe.

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sweetsomething101 sweetsomething101

25-01-2017

the answer is air sacs

your welcome :))

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