what is heart????? explain
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Your heart is a vital organ. It is a muscle that pumps blood to all parts of your body. The blood pumped by your heart provides your body with the oxygen and nutrients it needs to function. Your heart is about the size of a clenched fist, and weighs between 300 and 450 g.
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The blood is a body tissue and is liquid in form. it consists of cells floating in the liquid medium. Blood cell are called corpuscles
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