torso and head
legs and arms
lungs
stomach
zero gravity
microgravity
regular gravity
interacting
walking
eating
talking
their sense of balance gets worse
their sense of balance doesn’t change
their sense of balance gets better
food poisoning
sleeping sickness
motion sickness
migraines
brains
hands
muscles
legs
it slows down
it swells with fluid before shrinking
it speeds up
nothing, it stays the same