they are all important. The lungs and heart are probably the most vital as the lungs bring in oxygen and the heart pumps blood containing oxygen around the body.
But skin helps to prevent an infection
Stomach digests food which we need to eat
Kidneys help remove waste products from our body
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Twilight Fang commented on :
thanks
Alex commented on :
The brain is probably one of the most vital too, as it controls your heart and lungs, as well most of your muscles!