destinyjones123455 destinyjones123455

15-05-2017
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The heart uses three layers of ________ to pump blood throughout the body.

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15-05-2017

muscles is what the heart needs

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hillzbillz hillzbillz

15-05-2017

three layers of muscle, or the heart wall, the parts are called epicardium, myocardium, and endocardium..

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