Eli5: how does stomach acid stay in your stomach while other solide materials are able to move on?
In: Biology
The stomach acid does leave your stomach along with digested food, your stomach just secretes more acid to replace it. The acid that leaves your stomach gets eventually neutralized in your small intestines by your pancreas.
In addition, the ring of muscle, or sphincter, at the end of your stomach is called the pyloric sphincter, which leads to the first section of your small intestines called the duodenum.
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