tersmalawilli tersmalawilli

26-04-2016
Biology

Answered

The beating of your heart is caused by _____.

valves opening and closing

contraction of heart

blood moving through the heart

relaxation of the heart

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bryanna0105 bryanna0105

16-03-2019

B is your answer hope this helps

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natashamehul natashamehul

22-02-2021

Answer:

I think it is B

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