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The average human heart weights approximately 11 ounces and is about the size of a clenched fist. That begs the question, with all the massive animals out there, which ones have the biggest hearts, and just how big are they?
The average human heart weights approximately 11 ounces and is about the size of a clenched fist. That begs the question, with all the massive animals out there, which ones have the biggest hearts, and just how big are they?