Operation Ouch based on the popular CBBC series Can you guess which of these amazing facts Operation Ouch has in store for you? a) That in your lifetime you'll spend a whole year on the toilet b) That you shed at least 30,000 skin cells every day c) That the biggest muscle in your body is in your bum ANSWER: All three of course Join Dr Chris and Dr Xand as they take a tour of YOUR BRILLIANT BODY Find out the incredible things your body can do, test your gross-out knowledge and try out cool body tricks at home.