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Are you ready for Ouch! Snips?
They do everything from pumping
blood around your body to
helping lift your heavy schoolbag.
Meet Tiny from Tottenham.
Yep, we've already met.
put my brother down!
Go on, mate.
Put me down!
You've got a lot of muscle.
Can we have a look at your biceps?
Chris, not you.
How big is that bicep?
inches - so that is 61 centimetres.
That's amazing! So Tiny's bicep is
probably bigger than your waist.
Tiny's muscles are big and very,
but what are they made of?
Well, your muscles are made up
of fibres formed from millions of
and blood vessels deliver the energy
that your muscles
need in order to move.
It's been an absolute pleasure.
so much for coming in today.
Chris, never be cheeky to
a man called Tiny!
So, how do our muscles
Now, your brain controls
your muscles by sending a small
down a nerve to the muscle.
That tells the muscle to move.
But what happens when we take
control away from the brain
and stimulate the muscle directly
with these electrodes?
I'm attaching electricity-conducting
pads to Chris' arms.
When I press these buttons,
electrical charges are sent
directly to his muscles,
which will make his arms move. See?
That was me!
Now let's see how many
beakers Chris can down
while I try to override his brain
and control his muscles.
Chris is struggling.
You can't... You can't...
You cannot let go!
Just put it down.
So, we know what
makes your muscles move,
but how do your muscles
make your bones move?
Well, it wouldn't happen
without your tendons.
To show you how tendons
move your bones,
I have invented this - a model arm
made of space-age materials!
Xand, this is something
made of cardboard, a bit of string
and some straws.
all of those things in space!
Now, this is the muscle,
this is the bone,
and this piece of string is the
tendon connecting the two of them.
Now, when I take this balloon,
put it in here and inflate it...
When Xand inflates the balloon,
it's like my muscle contracting,
and it pulls on the tendon
and moves the bone.
Your tendons have to be strong
so that they can lift
and move your bones
and anything else you're carrying.
The strongest and thickest tendon
in your body is the Achilles tendon.
And it... What have
I told you about shoes in the lab?
I thought everyone would like to see
my Achilles tendon! It's right here.
It connects my calf to my heel.
Do you know, Chris,
your Achilles tendon is meant to be
stronger than steel?
It's just a shame we don't have any
way to test that in the lab.
Well, Xand, I actually have the
perfect experiment for this,
but we do need to head outside.
And you're going to need this.
Let's go find out how it works.
This is a horse's tendon.
These are scientists from
Queen Mary University of London.
They're attaching these
clamps to the horse tendon, which is
then frozen with dry ice.
Let's test how strong this
tendon really is,
but maybe we should start with
Well, what about Zahara?
She's right here!
Oh, hi, Zahara!
Well, sounds like it's
time for some tendon-powered flight!
Get in the bag! Come on.
Are you strapped in?
We'll see you when you land!
Remember, Zahara's body weight
is being supported
only by the horse tendon,
but will it hold?
Three, two, one...
That one small tendon is holding
the full weight of Sahara.
We're going to push this horse's
tendon to the limit and see if it's
strong enough to take the weight
of not one of us but both of us!
You guys are crazy!
Three, two, one... Liftoff!
This is incredible! The only thing
holding us up is a horse tendon!
Wow! That one little tendon is
taking our combined weight of 180kg.
It really is as strong as steel.
See you next time. Bye!