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