A blue whale’s heart weighs about 14 times as much as an elephant’s heart. Short-tailed shrews have recorded heart rates of 750 bpm at rest (and 168 breaths). The human heart weighs about 0.6 pounds (0.3 kilograms), but a giraffe's weighs about 26 pounds (12 kg), since the organ needs to be powerful enough to pump blood up the animal's long neck. As a blue whale … Do the math to compare its size to a whale heart—don’t worry, it isn’t hard: 16 ounces in a pound, so 400 pounds is 6400 ounces. 750 bpm. The blue whale represents the extreme upper limit of size and physiology . It’s aorta is 9 inches in diameter. The blue whale's heart is huge. ... of a 1960s VW beetle compared with two and a half Formula One race cars. Conservation. Life Expectancy. Sound. The human heart weighs between 9 and 11 ounces, less than one pound, and is about the size of your fist. Write the length on the board. It's the largest heart in the animal kingdom , weighing about 400 pounds (180 kg) and roughly the size of a bumper car. Oxygen is pumped around its enormous body by an equally massive, four-chambered heart. “This blue whale had heart rates ranging from 2 bpm to 37 bpm, which is more than an order of magnitude difference — 10-fold,” Goldbogen tells Inverse. decibels. It has to be large enough to pump about 15,000 pints of blood as compared to about 8 pints in a human. Heart. Blue whales exchange between 80-90% of oxygen in their lungs each time they breathe, compared to just 10-15% in humans. The heart makes up about 5% of an elephant’s weight. In the Oceans. Disclosed in … Years. (400*16) More facts about blue whales. The immune system of the blue whale is as good as the human's and other land mammals; the species is healthy and could resist an epidemic of bacteria or fungi. There are 16 ounces in a pound. 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