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Why is weight of heart less than weight of body ? 

The body consist of many organs. The heart is only one organ. since there are more organs in the body it weighs more.   

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Is there any other scientific reason
im not sure.
Let me research
im studying 10 th class they asked the question in prefinal I was not awarded marks for ur
plz mark it as brainlist.......
"In normal adults, its mass is 250 g - 350 g, but extremely diseased hearts can be up to 1000 g in mass."
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i m sure
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