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Pavlova-9 [17]
3 years ago
13

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) f

our directions d) one direction
Medicine
1 answer:
Lady_Fox [76]3 years ago
7 0

Answer:

B

Explanation:

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

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