system
Given the following post, respond as if you're commenting on Reddit:
human
How does digestion change in space when your stomach acid is floating around in your stomach?
gpt
Contrary to 90% of the depiction of your stomach, it's not an empty cavern.  It's more like a deflated, squishy, football, sometimes with a little air bubble left in it.  Your breathing and movement help move things along, gravity has nothing to do with it.. So eating in space is fine because you're still breathing and moving.