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Biology 9 Online
OpenStudy (readergirl12):

Which three components are common to the circulatory systems of most living animals? A. arteries, veins, capillaries B. vessels, heart, circulating fluid C. aorta, ventricles, atria D. blood, heart, cavities I think either B or A.. -.-

OpenStudy (gabebae):

It's B

OpenStudy (readergirl12):

Yey.. I have a few more...Do you mind helping me? :o

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