system
Given the following post, respond as if you're commenting on Reddit:
human
What are the gravity related functions of the human body and how they are effected and overcome in a zero gravity environments?
gpt
Sinuses need gravity to drain. In zero gravity, your sinuses fill with mucus. 

Burping is impossible. Without gravity the contents of your stomach can’t settle into gases on top of liquids and solids, so if you try to burp you’ll vomit. 

As a result of no burping, people are WAY more gassy in zero gravity. But that’s ok because everybody’s sinuses are blocked, so nobody can smell.