system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: when we suck in our stomach what's really happening? Like are my organs actually moving or is it just air? Why would I had so much air in my belly, shouldn't my organs be there, and doesn't air just go to your lungs?
gpt
Your body is full if fluids alongside all of the organs, and yes some of your organs can slide around. When you suck in your gut, you can feel your ribcage expand. Some fluids move up into this area, allowing you stomach to appear smaller. Your organs will slide around a little, but unless you're using a tight corset, this movement isn't going to be drastic.