Heart of blue whale weighs 600 kilograms and is the largest known in any animal. A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
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Heart of Blue Whale
Heart of blue whale weighs 600 kilograms and is the largest known in any animal. A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
