oh son what have you been eating voting is completely natural it's just your body's
way of getting rid of unwanted built up gas and everyone does it about 14 times a day it doesn't
matter if we're talking about your head teacher or the queen herself we all do it and it's honestly
not your fault he is actually right there inside your large intestines there are millions of good
bacteria that are there to help break down food and as they eat they produce a mixture
of gases which is what makes you let rip this combination of gases is made up mainly of air
carbon dioxide hydrogen sulfide and methane and the methane contains a lot of energy we're about
to show you and for this i'm going to need a special piece of equipment chris's hand
now this is a cylinder of methane and i'm going to release one day's worth of farts
this experiment is highly dangerous we're in a controlled lab using specially manufactured gas
don't even think about trying this yourself get your hand wet now scoop up those bubbles
that's right hold them well away from you i don't like the look of this
ah that was amazing so that's how much energy there is in a day's worth of farts exactly
that's one day's worth of farts well you know what we have to do now
a week's worth precisely one week's worth of farts
that's really good isn't it so we've done a day we've done a week dare we do a month yes we do
dare do it here we go ice it wow that was amazing wow so we've shown you just how incredible your
intestines are and how much energy there is in your farts remember when you let rip it's an
essential part of how your body gets rid of excess gas the reason chris is on the bike is because i
want him to try and heat up this beaker of water to exactly 37 degrees celsius i think i got the
short straw here my bike is actually generating electricity to heat up the water in that beaker
you need to rest chris oh yes thanks you can't have a rest come on keep going 35 35 and a half
36 36.5 37 perfect you can stop oh you've over shot it's up at 38 sorry i'm gonna have to add
a low device and then we'll start all over again that's good keep going now 37 degrees isn't just
any old random temperature we've plucked out of the air it's the temperature of your
body's core which is this bit here where all your internal organs are boy you don't need to prod me
so your organs work best at 37 degrees and your body tries to keep your insides
at exactly this temperature you know what i've had enough i think i have clearly demonstrated
that trying to keep something a constant temperature is hard work but your amazing body
does it every day without you even noticing it and no matter what you throw at it as we're about to
show you today we're going into battle with our own bodies to see if we can get our core body
temperatures to change it's time for crescents on versus our core body temperatures snappy names on
thank you now we can only do this experiment because we're doctors and it's being done in
very controlled conditions for this battle zone is gonna sit in a super hot bath for 10 minutes
while chris will sit in an ice bath for 10 minutes he'll be freezing and i'll be boiling but will it
affect our core temperature let's find out so i shall be captain cryogenic i shall be
dr war doctor warm is that the best you can do i think it's quite a good name
for a core body temperature fighting superhero what's so great about captain cryogenic anyway
well for a start the words captain and cryogenic both begin with the same letter
okay so we're ready to go it's time to try and beat our core body temperatures let battle
commence so chris gets into his ice bath while zand pops into the toasty warm bar this is hot
we've already taken our core temperatures and we've both got a reading of 37.7 degrees celsius
now to do this experiment properly we've put special super accurate thermometers inside our
bodies can you guess where they are is it a in our armpits b in our stomachs or c off our bottoms the
answer is c but don't be alarmed they're coming out as soon as all this is over remember we can
only do this because we're doctors now we're getting out and about with our mobile clinic
today we're at a theme park to help solve your medical mysteries if you're anxious about an
ailment or curious about a condition then the altmobile is the place for you that is incredible
zand is preparing the clinic ready for his patients and later he'll be out in the park to
answer your burning questions at the clinic zond is open for business can i have the next patient
first in is nine-year-old byron with a question about some interesting bumps on his body
so byron why have you come to the archmobile today to show my warts and my what
what's the diagnosis doc sounds to me like a case of i've got a water on my thumb and
i've got a walk in my foot and they won't go away itis double trouble have your thumb here
now that is just an absolutely classic wart can we have a look at the one on your foot
does it hurt at all no what can you do about what well a lot of wars just go away on their own but
some people they don't like the way they look or they take a long time to go away in that case you
can either put some chemicals on and that will get rid of them or you can use a freezing treatment
and that breaks the cells in the warts and means the warts die and go away but as long as you have
got a wart although it's not really a problem you don't want to spread them onto other people so if
you go swimming you want to put a sticky plaster over the water in your thumb and one and the one
and you bird and that will stop them spreading at the clinic he's open for business can i have
the next patient first in is eight-year-old zoe with a question about some bendy bits on her body
zoe why have you come to the outro mobile so i've got a really bendy body what's the diagnosis doc
this sounds like a case of i've got a really bendy body itis that's what i'd say can i have a look at
what you can do i'm trying to bend my arm all the way around oh well i think i can do that
oh wait a minute you're doing a thumbs up while i'm doing a thumbs down wow that's
amazing what else can you do touch my elbows behind my back okay i can at least do this one
are they touching are they close oh why do i bend so much my friends don't
what you've got is a thing called hyper mobility most of the time your joints are held in place
by things called ligaments and they're like very tough elastic bands that keep the bones together
now those ligaments are mostly made of something called collagen and in most people the collagen
is quite tough but for you it's a bit more flexible it's a bit stretchier and that means
that your joints can move a little bit more it doesn't do any harm though but it does mean
you're a bit more bendy than other people it's time for competitive coughing what is going on
well i've made these cut-outs that look just like you and me they don't look anything like me
they're all blue i'm the green twin everything i wear is green it's greenish
does that look to say it's turquoise doesn't look anything alike it's not relevant the point is
i've put plates full of a special scientific gunk called agar jelly on the faces of our
cutouts so if any bacteria happen to land on any of our plates they're going to multiply so much
we can actually see them okay chris you ready three two one cough we're doing two experiments
one where the plates are 10 centimeters away and another where they're 50 centimeters away well all
done not quite chris i want you to take this agar plate and hold it in front of your face and i'm
gonna cough on it and this time i'm gonna cover my mouth with my elbow the way you're supposed to
and hopefully no germs should land on the plate okay we'll just make sure you do it properly
and now we have to wait
in lab conditions bacteria takes some time to grow luckily we came prepared for a long wait
and finally the test results are in so let's check out the cutouts
that were 50 centimeters away first
oh yuck this has worked really well all these bacteria have grown into thick furry yucky blooms
well let's have a look at mine oh they're even worse than zan mine are also growing in horrible
slimy furry green colonies and all this from just one cough now for the cut outs that were only 10
centimeters away oh this is even worse there's loads of furry stuff in here oh that is disgusting
let's have a look at mine oh there's a huge bacterial splat in the middle of the plate
i must have coughed up a lot of saliva with that one so this is like coughing into someone's face
when they're right next to you and that's bad news for them when you realize that the average cough
has 20 000 viruses in it which brings me to our last result let's have a look at the plate where i
covered my mouth and coughed at chris two bacteria i knew you hadn't covered your mouth properly
i think you can see though that this is a lot better than the other ones we did
so there you have it in case you were in any doubt about whether or not to cover your mouth
when you cough we've shown that not only could your cough reach the person right next to you
but it could travel a lot further than that yuck and as well as seeing how far they travel
we've shown you just how much bacteria there can be in coughs lots of emergency cases arrive at
old hay and other hospitals by air all over the uk there are helicopter services ready to help
today's hospital hero is london air ambulance pilot captain neil jeffers and we're going to
meet him well chris is late i've got no idea where he is at all but captain neal is not going to be
pleased and this is a little bit embarrassing there's zardi where is he come on chris
oh it's a shame he's missed this probably should have told him about it
the helicopter's here the blades have stopped turning and it's safe to approach
ah hi zand sorry you missed that really is the only way to travel i'm going to
start getting a helicopter to work a bit more often this is outrageous i've been giving chris
lots of tea because i want to use this bladder to show you what happens when we empty it
i'm going to use an ultrasound so that we can see what chris's bladder looks like now that it's full
now what you're looking at here these top layers are chris's tummy muscles and then below here
this big black blob that's all of chris's bladder it's full of clear liquid which is urine now the
reason chris needs to go so badly is because the sensors in his bladder wool are detecting
all the stretching and this is known as the maturation reflex the point at which you really
really have to go i think pretty confidently i can say that i'm about to feel the maturation
reflex all right go ahead then what here in the lab just this once on one occasion you're allowed
to pee in the lab chris i think i'd better because i don't think i'm going to make it to the toilet
i'm going to hold the ultrasound scanner against my bladder while i'm wearing
so you can see it shrinking as i go to the loo okay chris let your micturition reflex go
we can see on the ultrasound that chris's bladder is shrinking and that's because
the muscle fibers are pressing on the bladder forcing the wheel out that's great
and you can't see his bladder anymore at all completely empty
i've been bitten the mosquitoes are ridiculous at this time of year i know how you feel now did you
bring some anti-histamine cream not by a mosquito chris why a zombie what's this what happened
they came out of nowhere they lunged at me they must have smelt my blood that's
you might be right this actually could be a zombie bite if what i've read is true
the next thing that happens is that the infected area that area
becomes more produced and discolored and that is exactly what's happening fascinating after
a zombie bite the first thing that happens is that the surrounding area becomes brown
like a bruise that's because the zombie's blood has started to mix with my blood and a zombie's
blood is black well zone the blood test would seem to confirm a case of being bitten by a zombie
i mean look at this it's completely pitch black pretty soon you're gonna be cold to the touch
so where's my thermometer where did i put it i must say i'm beginning to feel a bit chilly well
i'm not surprised i mean look at you zand let's take this under your tongue and the thermometer
confirms it zand you have no temperature at all and that's because like all zombies my body
isn't making heat anymore i'm really no longer human and my eyes are beginning to itch a bit
now this is interesting this is a classic sign what is have a look sound here's a mirror
inside your eyes you have the retina at the back and then the iris at the front
which is the colored bit unlike in humans zombies irises don't have any colour at all
sand how are you feeling to be honest i'm feeling a bit peckish well that's not surprising because
of course the final stage of becoming a zombie is an overwhelming desire to eat human flesh
how would you have treated someone during the first world war with a very badly broken leg
basically you'd use a thomas splint and the way this works is by re-knitting the
bones together and using something called traction if you break your legs very badly
the muscles around it pull the legs shorter and the bones overlap
traction works by pulling the muscles back to allow the bones to be realigned
stabilizing broken bones likely saved lives during the war as it meant blood loss could
be controlled and there was a better chance of keeping infection out it looks very uncomfortable
to use is that right yes it's incredibly uncomfortable maybe zealand should have a go
yeah i think so brilliant brilliant all right then if you hold it straight okay okay and we need to
it's pretty difficult doing this kind of thing if we imagine him in the trenches covered in mud
like this and presumably you'd be working with people shooting at us and shells landing around
at the same time yeah you're starting to see how difficult medicine would be in the trenches
you can see why you don't even bother to wash your hands beforehand the mud gets into everything
so basically as richard's tightening there this frame is now pushing in your groin and the bones
that are broken here will be being separated and then they can grow back together normally what's
amazing is to see this being used in a replica of a world war one trench and to think i've used one
of these in a modern emergency department it's exactly the same thing so how do you feel sand
is it comfortable it's not very comfortable for me and it would be very painful if i really had
a broken leg but my leg is very well supported it would also mean i'm much more likely to survive
to show you how your sensory neurons detect the difference between hot and cold sunlight and
we're going for a swim now because the sea is cold i've decided to pre-acclimatize and i'm already
pretty cold myself zand on the other hand has taken a different strategy
now my strategy is to get as warm as possible before i get in the freezing ocean
come on you've had enough time in there let's get going five more minutes chris
there's still a little warmth left in the hottie you've had quite enough time you've
been in there an hour and a half give me that come on it's freezing out here
okay are you ready zar i'm boiling i can't wait to
get in all right last one into rotten egg three two one ow ow
this is embarrassing oh lovely
what it's crazy it's absolutely tropical what why is your big emotion what about the nightmare
devotion could you keep there no don't be afraid sensory neurons work by detecting the difference
in temperature between the water and your skin there's hardly any difference between my cold skin
and the cold water so i feel fine but for zand there's a big difference between his warm skin
and the cold water so he feels extremely chilly once his skin temperature drops he'll start to
feel okay too i must say now it's absolutely lovely rosanna that was a great success would
you like an ice cream i love an ice cream just give me a second and i can get on my
hat my hoodie my dressing gown my blankie good luck finding your blankie bye chris
you