Why Doesn't Your Sphincter Get Tired

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2 Jun 2025

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Keeping a muscle clenched usually tires it out eventually, but that’s not the case for sphincters, which do things a little differently. Hosted by: Hank Green Head to for hand selected artifacts of the universe! ---------- Support SciShow by becoming a patron on Patreon: ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, D.A. Noe, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook: Twitter: Tumblr: Instagram: ---------- Sources:

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