Food does not need gravity to get to your stomach!
The reason being is Peristalsis! In your esophagus when food goes through, it does not just go straight through. Peristalsis moves the food in wave like contractions to push it all the way to the stomach. That is why gravity will not affect the way that the food goes. It will not come back up through your mouth. This can be different however for drinks as they are not a solid object that can be moved with peristalsis. It would be much harder to swallow it, not very safe to try it.
The reason being is Peristalsis! In your esophagus when food goes through, it does not just go straight through. Peristalsis moves the food in wave like contractions to push it all the way to the stomach. That is why gravity will not affect the way that the food goes. It will not come back up through your mouth. This can be different however for drinks as they are not a solid object that can be moved with peristalsis. It would be much harder to swallow it, not very safe to try it.
Here is a video of how peristalsis works!
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