Dr Chris and Dr Xand show how incredible the human body is. The doctors reveal how big your lungs would be if they were laid out flat. Show more
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Dr Chris and Dr Xand show how incredible the human body is. The doctors reveal how big your lungs would be if they were laid out flat. Show more
CBBC is the BBC's multiplatform offering for 6-12 year olds bringing the very best drama, entertainment and factual programmes to its young viewers.
