Original photo by Unsplash+ via Getty Images
While exact numbers vary depending on factors such as body size and sex, the average giraffe heart weighs approximately 25 pounds — roughly 40 times more than the 10-ounce heart of a human adult. In addition to this stark weight differential, a giraffe heart measures 2 feet long, nearly five times a human’s 5-inch heart.
Giraffe hearts can also pump 16 gallons of blood per minute, which is more than 10 times greater than the 1.5 gallons that flow through a human heart in that same time frame. Furthermore, studies indicate that giraffe hearts make up 0.5% to 0.6% of the animal’s total body mass — slightly higher than the average measurement of 0.47% to 0.48% in our species.
Oops, incorrect!
It's a factA healthy human infant typically has a heart rate of 90 to 160 beats per minute (bpm) when sleeping, 100 to 190 bpm when awake, and around 205 bpm when crying. Most human adults have a resting heart rate of just 60 to 100 bpm.
This notable size gap extends to other organs as well. For instance, a giraffe’s lungs can hold 12 gallons of air, whereas the average set of human lungs has a maximum capacity around 1.6 gallons. And while Gene Simmons of Kiss is famous for his abnormally long tongue, it still pales in comparison to that of a giraffe, which clocks in around 21 inches long. The average human tongue ranges from 3.1 to 3.3 inches long.
Numbers Don't Lie
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The largest heart in the animal kingdom belongs to the ______.
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The largest heart in the animal kingdom belongs to the blue whale.
The first successful human heart transplant was in 1967.
The first known attempted heart transplant took place in 1905, when one canine’s heart was implanted — albeit unsuccessfully — into the neck of another dog. A little more than half a century later, in 1964, a human heart transplant was attempted for the first time, when doctors attempted to implant the heart of a large chimpanzee into a dying human. This effort also ultimately proved futile. But on December 3, 1967, a major advancement was made in Cape Town, South Africa, when Dr. Christiaan Barnard performed the first successful human-to-human heart transplant. Barnard implanted the heart of 25-year-old car accident victim Denise Darvall into the body of 53-year-old Louis Washkansky. The heart functioned as intended, though Washkansky passed away 18 days later from pneumonia. Barnard’s second transplant proved more enduring, as the recipient lived for nearly 19 months after the operation.
Bennett Kleinman is a New York City-based staff writer for Optimism Media, and previously contributed to television programs such as "Late Show With David Letterman" and "Impractical Jokers." Bennett is also a devoted New York Yankees and New Jersey Devils fan, and thinks plain seltzer is the best drink ever invented.
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