Eli5 How does food and liquids remain inside the stomach and not “leak out of your mouth” whilst being in space?
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A lot of answers here but none of them admit, yes, sometimes it does leak out in space. We have natural rings of muscle that close things off, that’s why you don’t just vomit if you bend over at the waist on earth.
However..food and liquids don’t really remain in the stomach in space. If you burp in space, you will likely also push out stuff in your stomach. (There is no gravity ensuring the lighter, burped gases are the only thing at the top of your stomach.)
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