Dr Chris puts Dr Xand inside a giant water balloon to show how viruses attack our bodies, and Dr Chris discovers how the shape of your ears enables you to hear. Show more
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Dr Chris puts Dr Xand inside a giant water balloon to show how viruses attack our bodies, and Dr Chris discovers how the shape of your ears enables you to hear. 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.
