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