Operation Ouch!

The Doctors explain how we breathe by inflating a real life pig's lung and Xand finds out all about the biological changes that happen when you hold your breath. Dr Chris gets icky and picky as he takes a very close look at the job that snot, bogies and mucus do in our bodies. And there's no need to be scared of scars as we find out how your skin heals itself after an injury.

Category

Children / Medical / Science

Original air date

19/12/2012