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