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Operation Ouch!

Series 11

Magnificent Mucus

on CBBC HD

Available for years

The doctors reveal the power of mighty mucus in keeping bacteria and air particles out of your airways. And in the emergency department, Maisie has a bead stuck up her nose!

CBBC HD

About CBBC

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.