system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does your stomach feel like it's sinking when you're anxious?
gpt
Your stomach responds to stress by shutting off non vital systems and pulling blood to your heart and brain. Your stomach isn't considered a vital system, and so it basically stops flexing the muscles keeping everything in place, and so whatever was in your stomach or intestines has one less thing stopping it from leaving.