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