Operation Ouch! — Season 11

3, 2, 1 blast off! Dr Chris and Dr Xand explore what happens to the human body in space, tackling the big body questions on everyone's lips - what happens to your snot when you sneeze, do you really get taller, and how do you poo and wee in zero gravity? Find out as Dr Chris boards an unusual flight to experience being weightless, and Dr Xand meets a real astronaut. Plus discover the amazing exercise machine that will change lives for astronauts and people on earth alike.

The doctors are talking cancer, explaining what it is, why people get it, how it can be treated and how to help someone going through it. 

The doctors put the strength of human hair to the test and find out what makes different colours and types of hair.

How do you see in colour? And how can your eyes see in the dark? Time for Dr Xand to become Night Vision Man! Plus, we see a camera go inside Dr Chris's lungs!

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There's flamenco dancing in the lab as the doctors take a look at fat pads in your feet. And find out what to do if someone falls from height.

George the tree frog joins the doctors to investigate how your Achilles tendon works using huge catapults! And there is a suspected spider bite in the emergency department.

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Find out why the human body is mostly made of water as the doctors investigate the hypothalamus, the amazing part of your brain that keeps you hydrated.

The doctors reveal that your liver is an enormous energy storage system and join Lilia for an amazing operation on her brain.

The doctors supersize the alveoli, the tiny air sacs inside your lungs. And it's fingers on buzzers in Ouchology - who will get snotted?

The doctors investigate how your lungs move, with the help of a huge water slide! And today's British Sign Language sign is 'dinosaur'.

The doctors put the acoustic reflex to the test with an enormous balloon, and a serious case of snotting awaits the loser of today's Ouchology.

The doctors reveal how the human brain creates maps to prevent getting lost.

The hunt is on for grossest thing ever seen on Operation Ouch!