Proving what?

So this valve is called the Tricuspid valve.

And it passed through the valve here. So this valve is called the Mitral valve.

Proving they're gullible idiots.

Civil Horizontal Valve

One will be the tricuspid valve and the other the mitral valve.

But before it goes it has to passed another valve. So this is a valve right here. Call it Pulmonary valve.

I'm not at a proving stage.

There seemed to be nothing worth proving.

The main valve is turned off.

Here you've got the aortic valve.

We've had science proving the urgency of change.

This is called a cycle valve tube.

Up here you have the pulmonary valve.

And then the final valve, I need to find a nice spot to write it maybe to right here, this final valve that passes through is called the Aortic valve.

You can see how the pulmonary and aortic valve are closed when the mitral and tricuspid valve are open.

Can I borrow a heart valve from you?

And this is how you make a valve.

It's gonna go back perhaps through the mitral valve, it can go there, or it might go through the tricuspid valve.

The technology was proving itself to be robust and scalable.

I was actually proving to be a magnet for people.

This is actually a heart valve, which we engineered.

It's about proving who you are and what you can do.

I welded the breech, but the valve is still gaping.

Does the color of the valve matter? What matters here?

In fact, it turns out it's equivalent to proving Fermat's Last Theorem.

Let's watch. (Sound of air escaping from valve) (Music) (Whirring sound)

If he were wrong it would be the surest way of proving it.

Open the air inlet valve to supply compressed air to the machine

And the way you engineer this heart valve is the same strategy.

You'd have a tough time proving I broke any laws and you know it.

Nine hundred and ninety nine miles went well, the last mile's proving incredibly stubborn.

You can see two of the leaflets of the aortic valve working there.

It turned out to be absolutely instrumental many decades later in proving Fermat's Last Theorem.

Here you have our tricuspid valve. And I'm gonna label it just as 'T'

I've drawn the pulmonary valve as being open, but is that really the case?

On the starboard side, there's a big valve! Can you crank that boat down?

system

System

System

System

System

And as they're shaped, they're raised again, all along proving that they're alive, and developing character.

This is actually a heart valve that we've engineered, and you can see here, we have the structure of the heart valve and we've seeded that with cells, and then we exercise it.

It has a funny tri lobal shape at the bottom, which contains the aortic valve.