![]() Leigh and her colleagues surgically removed the entire digestive tubes from 32 dead sharks that had either been donated to their project or conserved in the Natural History Museum of Los Angeles County, representing 22 shark families. “Sharks have all these different little tweaks to the Tesla valve design that could be making them more efficient,” she says. Their intestines are also shaped in a way that only allows food to flow one way – like a performance-enhanced Tesla valve, says Samantha Leigh at California State University Dominguez Hills. But sharks slowly channel their meals through spirals without needing muscles to push the food. Most animals have tubular intestines that use muscle contractions to push food along like squeezing a tube of toothpaste. Studying their anatomy could help improve industrial fluid-pump technology. Sharks have spiral-shaped intestines that work in a similar way to an unusual valve designed by Nikola Tesla. ![]()
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