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