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The heart of a 1-ounce mouse beats roughly 600 times per minute. The mouse lives an average of three years. An elephant's heart beats just 30 times per minute, but a 5-ton elephant will likely live 60 years or more.
In both cases, if the animals' pulse rate is scaled inversely as the quarter-power of the animal's mass, this notable fact is produced: The total number of heartbeats in a mouse's and an elephant's average life span will be roughly the same, about 946 million times. Used this way, the quarter-power law can be used to estimate life span.
But other species, such as people, mess up the equation. A human heart, beating a normal 65 times per minute, hits the 946 million mark somewhere around the 27th year of life, far short of the average human life span.
Every mammal's heart will beat about one billion times in its lifetime.
In a 70-year lifetime, an average human heart beats more than 2.5 billion times.
Originally posted by spacedoubt
I used to say this jokingly..about a "fixxed" number of heartbeats.
The reason I say fixxed, is because of this guy
He was an inspiration to millions of runners..But dropped dead at a young age after his daily run. Of a Heart attack. the cause was Cholesterol blockage..probably an inherited trait.
Originally posted by djohnsto77
I've heard this before, it is an interesting factoid.
I think humans are an exception because of our technology, intelligence, agriculture, and healthcare has greatly extended our lives.