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December 20, 2014

Homework Help: health

Posted by AK on Monday, July 28, 2008 at 5:56pm.

Which one of these statements is true regarding blood circulation?

A. For health and survival, it's critical for blood circulation to be ongoing and uninterrupted.

B. Normally, blood circulates in a repeating stop-start rhythm.

C. The heart deoxygenates blood that's returned to it.

D. Taking in large quantities of oxygen makes the circulatory system less efficient.

i dont know this one can you help?

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