Functioning of heart in our body and how rythamic contraction and relaxation happen?
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the function of heart is to pump blood throughout the body ...
when the blood comes to the heart at than it contract and when it goes to its other part it relax ..
like when blood enters to left Atrium from the lungs it relax and when it's go to the left ventricle it contract and then the left ventricle relax as the blood comes in it and when the blood go from left ventricle to the whole body than the left ventricle contract as it to pump the blood with force ...
hope it helps
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