The doctors reveal what lurks inside the plaque on your teeth, Dr Chris uses a remote-controlled car powered by his own wee, and Dr Xand decides to get his verruca treated.
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'He is Dr Chris.'
'He's Dr Xand.
'And yes, we're twins.
'Do you know how brilliant your body really is?'
I'm getting better.
'Well, we're going to show you.'
Oh, there you go.
'In this series, we'll be pushing our bodies to their limits.'
'By doing extraordinary experiments on each other... '
This is my sick.
'.To uncover what goes on inside...'
Ooh, er, that just came out of my ear.
Wow, that's amazing.
'From the bizarre...'
Can we get a sample of your snot? HE GROANS
'..to the incredible.'
So now I'm seeing things.
'It's time to find out what you're made of.'
Chris. Chris. Chris?
Coming up today...
On Operation Ouch.
'We bare our teeth to see what happens when you don't brush.'
DR XAND GROANS
'This man reveals an amazing body.
'And prepare yourself for the wonders of wee.'
-It really smells in here.
-Yes, it does.
Each year, over 18 million incidents mean people end up in
accident and emergency.
Let's see how the team fix our first patient.
'In accident and emergency, four-year-old Didi has
'come in with his mum and dad because he's in a bit of a fix.'
-I tried to push something up my nose.
I got a call to say he's got a screw up his nose.
'It's a toy screw, right?'
No, it's not a toy one. It's an actual screw, yeah.
'So how on earth did the screw get up there?'
'Didi and his friend were sitting on a mat at school.
'And there was a screw on the mat.
'Didi loved the look of that screw but so did his friend.'
'What's the big deal? It's just a screw.'
'It's not just a screw, Xand.
'It has a purpose and Didi knew what he had to do.'
'Repair that desk?'
'Fix that squeaky window?'
'No, Xand. He picked up that screw...'
'I'm on the end of my seat. What did he do?'
'He put it up his nose because...it fitted.'
'Oh, bad idea.'
'Yep, and now it's stuck up there and won't come out.'
'From the look of him, you wouldn't guess there was a big screw
'firmly lodged up his left nostril but there is.
'Now it's over to Dr Mashhood Qazi to get it out.'
-And, Mum, has he done this before?
-No! He hasn't.
Am I going to find some gold?
'No, Doc, there's no gold. It's just a screw.'
Let me see.
'Dr Mashhood has a look up Didi's nose to see
'where the screw is hiding.'
Didi's done a terrific job.
He's got a big screw up his nose, which we need to take out,
seriously, otherwise it's going to cause a lot of problems.
'So to get that screw out,
'the doctor uses a pair of medical tweezers.
'This might look uncomfortable but if the screw doesn't come out,
'it could damage Didi's nose and cause an infection.'
'But it won't budge, so Dr Mashhood changes tack.'
SHE BLOWS AIR
'Didi's mum blocks his right nostril then blows into his mouth to
'try and push the screw back down the left one.
'But still no luck.
'So after two failed attempts and the screw wedged well
'and truly up there, there's only one option left - an operation.
'We'll be back later to see how Didi gets on.'
'And now to our lab...
'..where we do incredible experiments.'
Ugh, it's disgusting.
'To show you how your body works.'
It's not pretty to look at but it is brilliant stuff.
'Just don't try anything you see here at home.'
Take a look at this.
It's a skull that's over 100 years old.
Now, it's from a five-year-old, but look carefully
and you'll see why I really wanted to show it to you.
'This skull has two sets of teeth. These are milk teeth.
'And these are the adult teeth.
'They're waiting to come through when the milk teeth fall out.
'But what's amazing about this, is that it's not amazing at all.'
If you're still waiting for your adult teeth, just think,
they're already in your head fully grown.
Underneath your skin, your skull will look just like this one.
Both sets of teeth are coated with enamel.
It's the hardest substance in your body.
It's even harder than bone but it's not indestructible.
As we're about to find out.
DR XAND GASPS AND GROANS
-Does my breath smell bad?
-Yes, it does actually.
I'm not surprised. I haven't brushed my teeth in two days.
But it's all for a good cause. Isn't it, Chris?
I hope so.
'In fact, it was my idea.
'Whilst I've been brushing my teeth twice a day, as you should,
'I haven't let Chris brush his at all for two days.
'But it's all in the name of medical research.'
My teeth feel fuzzy.
That's because Chris has a layer of plaque building up on them.
'I'm going to show you why plaque isn't something you want a lot of.
'When you go to the dentist, you'll have had your teeth
'scraped like this.'
-Going anywhere nice on holiday this year, Chris?
Oh lovely, I've been there. It's wonderful at this time of year.
Ugh, Chris, this is disgusting.
Plaque is a mixture of food particles, acid and bacteria.
We've all got thousands of different bacteria living in our mouths
and most of them are harmless but there are some bad ones that
can turn the sugars in the food we eat into acid.
'And it's this plaque acid that's the real problem.'
It eats away at the tooth enamel and that's what tooth decay is.
Please can I have my toothbrush back now?
Soon. There's more to show you.
'We're both going to rinse our mouths with a special blue dye
'that will show up how much plaque we have on our teeth.
'It's my brushed gnashers first.
-You look really funny.
-You look funny.
'Now even though Xand has been brushing regularly,
'you can see some dye has stuck to his teeth and that's all plaque.'
That makes me a bit worried
cos I haven't brushed my teeth for over two days.
-Ugh, why did you do that?
-It was your idea.
'Well, after a quick rinse with the blue dye it's time to
'check out the state of my un-brushed teeth.'
Ugh, there's plaque everywhere. How did you let this happen?
So if you compare my lovely clean brushed teeth with Chris's
disgusting, un-brushed teeth, you can really see the difference.
And all that plaque has built up in just two days.
-I feel quite disgusting. I would like my toothbrush back.
'I want to get a much closer look at your plaque, Chris,
'which is why I've put a dollop of it under this microscope.'
-Look at this.
So these bacteria are the ones that live in my plaque
and although we can't tell which are the good ones
and which are the bad ones, some of them
are the ones that produce the acid that is rotting my teeth right now.
Yep, and if you just leave plaque it hardens like cement.
That's called tartar, and it builds and builds.
It can damage your gums and give you rotting teeth that look like this.
Not a good look.
That's it, I've had enough. I am going to brush my teeth.
No, he's not.
The kitchen. For you, it may be the best room in the house
with its stainless steel work surfaces,
its fancy oven with two kinds of heat
and top-of-the-range refrigerator stocked full of goodies.
But the kitchen can also be a place of danger.
-Can't it, Xand?
Is that a fake comedy knife?
Good, because knives can be dangerous and could cause a bad cut.
Is that a comedy fake hand?
Good, because we need safety in the kitchen at all times.
Now let's relax with a nice cup of tea.
Ooh, I'll get it. KETTLE WHISTLES
Isn't that nice of him?
Ooh, hold on. The water, it's boiling...
-DR XAND SCREAMS
Xand, is that a comedy burnt finger?
No, it's a minor injury.
'So what should you do if you get a burn?
'Should you - A - hop up and down and tap it with a wand?
'B - ask it politely to stop hurting?
'C - run it under cold water?'
'Oh, I do like magic, I hope it's option A.'
The answer is C.
'So to treat a burn...'
Run it under the cold tap as quickly as possible
and keep it there for a good ten minutes to cool the burn down.
Right, job done.
-Oh, can we have that cup of tea now?
-Yeah, come on.
LOUD TRUMP OF WIND
Was that a comedy whoopee cushion making that noise?
'So remember, run a burn under a cold tap for ten minutes
'but if you're worried, tell an adult.'
'We've got some incredible body tricks
'for you to show your friends.'
'Want to find out how you can stop your mates from simply
'picking up something off the floor?'
'We're going to show you.'
-Xand, to do this trick, I'm going to need some money.
-Oh, all right.
It's my lunch money. I'm going to need it back.
Well, I tell you what, you can have it back
if you can pick it up off the floor. If you don't pick it up, I get it.
Sounds quite easy.
Got it. That was a rubbish trick. Who thinks that was a rubbish trick?
All right, well, we'll do it again.
This time you won't be able to pick up the money.
So go and stand against the wall.
Now, keeping your feet where they are,
I just want you to bend down to pick up the money.
Come on, Xand, pick it up.
Chris, what have you done?
Ah, I can't get it.
So it looks like I get the lunch money, doesn't it?
'Come on, then, let's see if anyone else can do it.
'She definitely can't.
'So why can't anyone, including Xand, pick up the money?'
When you bend over, your bum pushes back
and the wall's stopping it from pushing back.
'George has got it.
'Normally when you bend over to pick something up, your body will
'adjust itself backwards in order to balance it out.
'So when your body's flat against the wall, you can't go backwards
'and there's no chance of picking up that money.
'All you can do is fall forwards.'
So I'm going to need the money back from all of you guys.
Give my money back! Come on, Xand.
Remember Didi who had a screw lodged up his nose?
Let's head back to accident and emergency
to find out how he's getting on.
'Back in Manchester, four-year-old Didi is in hospital with
'a large screw wedged up his nose.
'He'd been playing with his friend
'when they saw a shiny screw on the mat.
'Didi loved the look of that screw but so did his friend.
'They both wanted that screw
'and it was at this point Didi came up with a great idea.
'He picked the screw up and hid it up his nose.
'Only it wouldn't come out again
'and it's evaded all attempts to catch it.'
'So now it's over to the surgical team to get that screw loose.
'Didi's had a general anaesthetic to put him to sleep.
'This means the surgical team can delve deeper into his nose
'and pull the hiding screw out without him feeling a thing.
'So here goes.
'With Didi totally still, it's not long before the surgeon
'catches up with that screw.
'At last, it's out.
-'Yep, it's a whopper.'
How did he manage to get it up his nose?
'Who knows? But a couple of hours later
'and Didi has come around from his operation to the good news.'
That was in my nose cos I was pushing it in.
'Well hopefully nothing will be going up your nostrils
'in the future.
'And with his conk clear, he's off home.'
'Still to come...
'Xand's got a foot that needs freezing.
'Evie's got a gash that needs gluing.'
'And I've got wee with secret powers.'
That really works well.
'Now, did you know that the average eyebrow has 450 hairs?'
'Wow, that's amazing. And so's this.
'On an ordinary street.
'In an ordinary house.
'One man is getting ready for his day.
'He likes a blow dry, then?
'Hang on a minute. Is he drying his face?'
'Oh, yes. Check this out!
'Meet Jesus Aceves. He has an amazing body.
'Jesus has over 60,000 hairs on his face.
'This is no more than the average man
'but whereas we will have tiny, fine facial hairs,
'incredibly Jesus' hairs are long and dark like the hair on his head.
'So what makes his amazing body like this?
'Well, Jesus has had his hairy face since birth
'and it's down to a genetic condition called hypertrichosis.
'Before we're born, we're all covered with a layer of fine hair
'which normally disappears about a month before we burst out
'but hypertrichosis means the hair continues to
'grow in unexpected places.
'His furry face keeps him toasty warm in winter and come summertime
'he treats his luscious locks to a trim to keep himself cool.
'Jesus is one of only 50 people in the world who have
'super hairy faces.
'Now that's amazing.'
'Your body can need mending in all sorts of ways and
'we're going to meet some special teams that are trained to fix you.'
'This is Rocco.
'He's come to see a foot doctor today, and so have I.'
Take a look at my feet.
They look OK, don't they, in a sort of foot-ish way. But look closer.
'Meet my verrucas.
'We've actually become quite attached.'
Verrucas are caused by a virus - the human papillomavirus.
They're rough mounds of skin that grow on the bottom
of your feet where it's nice and warm.
'I've had these ones for a while.'
But enough is enough.
'This is Nutan Shah.
'A podiatrist, or foot doctor, at the London Podiatry Centre.
'She knows everything about verrucas.'
Why do they stick around so long?
They like warm, dark, moist places,
so your foot is an ideal place for it to live in.
Basically the verrucas are saying my foot's good?
-It's like a five-star hotel.
'Well it's time for these guests to check out.
'First, Nutan has to cut off all the dead hard skin.'
This bit doesn't hurt at all.
It's slightly ticklish but it's actually quite pleasant.
So long, verruca!
'Now my foot's going to get frozen.
'This is liquid nitrogen which helps kill off the virus.'
Now it is quite painful. It stings.
'Liquid nitrogen is extremely cold.
'Minus 200 degrees centigrade, to be precise.
'That's at least ten times colder than your freezer at home.
'And with a few treatments, your verrucas are no more.
'With the freezing over, Nutan puts silver nitrate on.
'It stops any blistering and also helps kill the virus.'
What we do is, we just rub it on to the area
and eventually it will go black.
'Like Rocco's. He's already had a few verruca treatments.'
How do verrucas feel on your foot? Do you notice them?
At first, when I used to step on the ground without
any shoes, it really started hurting me.
Cos that's what I noticed, with shoes on, it's not really a problem.
'It's important to remember that this virus is contagious.
'So don't touch it.
'Don't pick it and make sure you don't walk around anywhere
'barefoot, or you'll spread it.
'Now, brace yourself, Rocco, here comes the liquid nitrogen.'
'Yep, takes your breath away.'
You've got a really good technique.
-Like you're just laughing through it, right?
'So, freezing over, there's a coat of silver nitrate.
'And we're both all done.'
If you've got a verruca that won't go away, people like Nutan
are here to help. But remember, lots of verrucas do go away on their own.
It might just take a while.
So, in the meantime, why not give it a name?
Mine's called Dr Chris.
Just don't tell him.
When you get injured, your body is brilliant at mending itself.
This next boy should know, he's always having accidents.
# If there's a bone to break he'll break it
# If there's a wound to graze, he'll graze it
# If there's an ankle to sprain, he'll sprain it
# He's the unluckiest kid. #
'Look out for that squirrel.
'When you break your arm, it's called a fracture.
'And it gets put in plaster to keep it in place.
'But underneath, the real fixing is done by you.'
'Your broken bone leaks blood and it contains special building blocks,
'including fibres from proteins called collagen and cartilage.
'They build a temporary bridge called a callous
'and it stays in place for about three weeks.
'Then a specialist team called the osteoblasts move in.
'These are cells that make tiny bits of bone that set like cement.'
'After a few weeks, your bones have repaired themselves.
'Your cast will be off and you're as good as new.
'Just watch out for squirrels.'
'Uh-oh. Oh, dear!'
# He's the unluckiest kid. #
Now sometimes on Operation Ouch what we really...
What are you doing?
-I'm holding it in.
-Why didn't you go before I started?
-Because I need it for this week's Investigation Ouch.
Now, I know what you're thinking.
You should have flushed the toilet, Dr Chris.
Well, you're wrong. I didn't use the toilet.
But I am going to wash my hands.
'I'm actually taking my wee to Bristol.'
It's here somewhere. Can you get out the map?
'Because apparently it contains hidden powers.'
This is the Bristol Robotics Laboratory
and some scientists here have decided that, rather than
flushing their wee down the toilets, they're going to use it as a power
source, and that's why I've brought mine all the way from London.
I suppose I could've just gone when I got here.
Come on, wee-wee.
'We're off to meet Dr Ioannis Ieropoulous.
'He's the brains behind pee power.'
So, Ioannis, I've got something for you.
-Oh, wow. Thank you very much, Chris.
-It's my pleasure.
The first thing to say about being here is it really smells in here.
Yes, it does.
It's basically a bit like, imagine instead of leaving
your classroom to go and pee, everyone just peed on the floor.
That's a bit like what it smells like.
But you're putting the wee here to slightly better use, aren't you?
Yes. So we use urine as a fuel for electricity.
'Yep, you heard right. They're turning wee into electricity.'
So how do you do that?
So we will take this urine
and we will add it into microbial fuel cells which are something like
batteries, only they have living micro-organisms inside, living bugs.
'The bugs living in the microbial fuel cells, or batteries,
'feed on the sugars and proteins in urine, breaking it down.
'And this process creates electricity.
'In fact, this four litres of wee could create enough power for
'20 minutes of talk time on a mobile phone,
'but that's not all it can do.
'Time to see my wee in action.'
So this is basically a battery, is that right?
-Yes, a very complicated one.
-And what do you use it to power?
At the moment, we use it to power a remote controlled car.
-A remote controlled car?
That's quite cool, I love remote controlled cars.
'To get the car moving, we first need to top up the battery.'
So each one of these things that I'm putting the urine into
is a microbial fuel cell and there are bacteria in there
that are going to eat the sugars and proteins in the urine
and turn them into electricity which is then going to charge this car.
-That really works well.
'At the moment, it takes a very large battery to power a
'very little car but hopefully, it won't be long before the batteries
'get smaller and the things they can power get bigger.'
Ioannis, so that is amazing. But what's the future?
Well, the future is about developing the technologies that can be
implemented into developing world countries and provide electricity.
It's basically one wonderful way of turning waste into something useful.
'So hopefully one day urine will create power for people in
'developing countries to light their homes and cook their food with.'
Obviously this doesn't mean that you can go and pour urine into all
the electronic kit in your house and expect it to work.
That would be both incredibly dangerous and very, very smelly.
But what we have seen is that scientists have invented
a way of producing power from urine.
Now if they can only invent a way of getting rid of the smell.
Our next patient was expecting a normal day.
But she's ended up in accident and emergency.
Let's see her get fixed.
'In Sheffield accident and emergency, eight-year-old Evie has
'arrived with her mum and a rather nasty looking cut to her chin.
'Oh, catch that drip.'
It stings a lot.
'I bet it does. What on earth happened?
'She's in her wellies, is that a clue? Let's find out.'
'Evie lives on a farm.
'On a farm? What animals does she have?'
'She's got a pet donkey. Two sheep. Five horses.
'Three cats and two dogs.
'Awesome. So what happened to her chin?'
'Keep quiet and I'll tell you.
'It was snowing.
'Whoa, indeed it was.'
'Evie decided to go sledging.
'She was bombing down a hill.
'She's going very fast.'
'Yes. And then a huge gust of wind blew her sledge away.'
'She landed face first and her chin scraped along the snow
'and gravel beneath until she stopped.'
The snow wasn't as thick as I thought it was.
'Never mind, here's Dr Suzanne Baron to take a look at that chin.'
Quite a gash this, actually.
'That it's quite a gash, duh!'
She's got a medium-sized cut under her chin which will definitely
need some cleaning and bringing the edges back together again.
'So, first the mission is to give Evie's wound a good clean
'and get all the gravel out that they can see.
'The skin on our chin has five layers for a piece of grit
'to get lost in.
'The combination of skin, fat, fibrous tissue
'and blood cells surrounds our skull.
'When these layers are broken, dangerous infection can occur.
'So it's important that we get that bit of grit out of Evie's chin
'and close up the hole.
'There's one stubborn bit of grit that just won't budge.
'Step up Nurse Susan Musson, grit extractor extraordinaire.
'If you're squeamish, look away now
'because to get a grip on that gravel she's using a needle.
I use just the very end of the needle,
just to keep flicking it out.
Eventually I got to the end of it and got it all out.
Yeah, it's come out.
'Well done, Susan.
'With the grit gone, steri-strips and glue hold the cut together
'until it heals.
That's all done. Does that feel all right? Well done.
That was very brave.
'And will brave Evie keep on sledging?'
Yeah. I'll probably go on the deeper snow in the deeper fields now.
'Good plan, Evie. You've got true grit.'
'Very funny, Chris.
'Next time, I'm on an emergency mission.'
There isn't any time to lose.
We've got to get the blood where it's needed as quickly as possible.
'This guy reveals an amazing body skill.
'And find out what happens when you puke.'
THEY BOTH GROAN
-We'll see you next time for more...
Subtitles by Red Bee Media Ltd
The doctors reveal what lurks inside the plaque on your teeth, Dr Chris uses a remote-controlled car powered by his own wee, and Dr Xand decides to get his verruca treated. Meanwhile, over in accident and emergency one patient has some grit in her chin and another has a screw stuck up his nose.