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The valves in the heart open and close to move blood in between heart chambers. O a) three directions O b) two directions O c) four directions d) one direction
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The valves in the heart open and close to move blood in between heart chambers. O a) three directions O b) two directions O c) four directions d) one direction

User Gregory Patmore
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1 Answer

5 votes

Answer:

B

Step-by-step explanation:

Two directions, the ventricles. In and out of the heart

User James Socol
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