system
Given the following post, respond as if you're commenting on Reddit:
human
Are there any bodily functions that are dependent on gravity?

Does my body work the same without gravity?
gpt
There was a post recently that said that your sensation of the need to urinate doesn't work the same in zero G. Normally you feel an urgent need to urinate when your bladder is one third full. In space, astronauts found they didn't get that sensation until their bladder was almost entirely full, making for some massive evacuations when they finally did go.