the heart is made almost entirely .what do they allow the heart to do?
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They allow heart to pump the blood to whole body and to separate oxygenated and deoxygenated blood
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Explanation:
Your heart is actually a muscular organ. An organ is a group of tissues that work together to perform a specific function. In the case of your heart, this function is pumping blood throughout your body. Additionally, the heart is largely made up of a type of muscle tissue called cardiac muscle.
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