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