system
Given the following post, respond as if you're commenting on Reddit:
human
How are spacesuits sealed from the vacuum of space when assembled?

I understand that the space suit provides air pressure to keep the fluids in your body in a liquid state, and that the suits are assembled in different pieces for the limbs and such. But how are these separate pieces sealed from the vacuum of space when assembled? (i.e. where the separate pieces connect)
gpt
The same way as docking. Joints lock tightly so air can't escape. It's like putting your finger over the neck of a bottle and flip it upside down. The liquid inside won't come out because your finger is in the way. 

Basically, a space suit is an upside-down water bottle with a finger on the neck.