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