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Author Topic: Why does a mouse have a heart beat rate 75 times faster than a Blue Whale's?  (Read 591 times)

Offline P-Kasso2

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I'd have thought that the bigger the animal the bigger the heart - but I absolutely can't figure out why such a little thing like a mouse (750 beats to the minute) or a hummingbird (over 1,200 beats per minute!) needs such a massively high heart rate.

It can't be healthy to have such a high heart rate - so why do mice etc have such phenomenally high heart rates for one so small?
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