Eli5 How does food and liquids remain inside the stomach and not “leak out of your mouth” whilst being in space?
In: 82
Your stomach has muscles around the opening to keep food inside. Thus why you aren’t vomiting stomach acid when performing a hand stand or otherwise upside-down. Furthermore, muscles around your esophagus will actively push food down towards the stomach in a process called peristalsis, allowing you to properly swallow and eat regardless of orientation or if floating around in space.
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