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Which mammal has the slowest heartbeat?
Quick Answer
Blue whales have the slowest known heartbeat of any mammal, dropping to about 2 beats per minute after a deep dive.
The Full Story
The blue whale has the slowest heartbeat known for a mammal. During deep dives, its heart rate can fall to roughly 2 beats per minute, allowing it to conserve oxygen. When the whale is active at the surface, the rate rises significantly, but it is still remarkably slow for such a huge animal. This extreme slowdown is a key adaptation for life in the ocean.
Key Facts
1.Blue whales can slow to about 2 beats per minute during dives
2.Their heartbeat is much slower than that of most mammals
3.They are the largest animals ever known to have lived
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Suggested video title for this topic:
"A whale heartbeat so slow you can count it on one hand"
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