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Which best explains the circulation system within mammals? A. Mammals use an open, double-loop circulatory system aided by a four-chambered heart. B. Mammals use a closed, single-loop circulatory system aided by a four-chambered heart. C. Mammals use a closed, single-loop circulatory system aided by a three-chambered heart. D. Mammals use a closed, double-loop circulatory system aided by a four-chambered heart.
Mammals use a closed, double-loop circulatory system aided by a four-chambered heart:best explains the circulation system within mammals.
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Asked 1/11/2018 12:04:58 AM
Updated 1/11/2018 4:08:31 AM
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Mammals use a closed, double-loop circulatory system aided by a four-chambered heart:best explains the circulation system within mammals.


Added 1/11/2018 4:08:31 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [1/12/2018 4:01:33 AM], Rated good by jeifunk
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