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OpenStudy (anonymous):
In a _______ the blood is pumped by a simple heart and goes throughout the body of a slow moving snail or oyster using open spaces called sinuses. A. open circulatory system B. closed circulatory system C. respiration system D. jet propulsion system Not to sure of the answer for this one.
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OpenStudy (anonymous):
@courtney7200
OpenStudy (anonymous):
A.
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