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Tcecarenko [31]
3 years ago
6

Which best explains the circulation system within mammals?

Biology
1 answer:
natka813 [3]3 years ago
3 0
<span>A. Mammals use a closed, double-loop circulatory system aided by a four-chambered hearts.

The four chambered heart of a mammal is divided into two atria and two ventricles. Double-loop circulatory system is used. One loop for oxygenated blood, the other loop for deoxygenated blood.</span>
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