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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 Jimski
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2 Answers

3 votes

Answer:

O b) two directions

Step-by-step explanation:

I think

User Matt Klepeis
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6 votes

b) two directions

i think

User Taptronic
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