Here you've got the aortic valve.

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

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

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

So when you have dub, you have noise coming from the pulmonic and the aortic valve snapping shut.

The drought led to an insufficiency of food.

In the middle, you can see that little structure squeezing out, that's the left ventricle, pushing blood out through the aortic valve.

So this valve is called the Tricuspid valve.

We call that the aortic arch.

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

Civil Horizontal Valve

Just pull the valve!

Okay. Uh, valve release.

Turbine release valve, activated.

Turn of that 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.

We need a pressure valve.

That external aortic root, it will never work, you know.

The main valve is turned off.

It's the pressure reg valve again.

This valve is a sonic trigger.

Surface compression of valve sensors, Captain.

Main valve on, main switch on.

This is called a cycle valve tube.

Up here you have the pulmonary valve.

So I set out to change the entire treatment for aortic dilation.

But you also know that if that is what's making the noise, you can kind of guess, and it's a smart guess that at the same time the pulmonic and the aortic valve just opened.

Can I borrow a heart valve from you?

And this is how you make a valve.

The starboard transfer valve has been opened manually.

Remove the valve and follow our instructions precisely.

Now look for the emergency valve release sequence.

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

This is actually a heart valve, which we engineered.

Okay, that's one valve down, three more to go.

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

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

We should pull the valve and bypass the whole system.

The package you've just received contains a small metal valve.

So this valve supposedly blew open because of metal fatigue.

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

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

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