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