Can I borrow a heart valve from you?

This is actually a heart valve, which we engineered.

Prosthetic hand.

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

So this valve is called the Tricuspid valve.

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

Civil Horizontal Valve

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.

He's got a prosthetic limb?

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.

Again, a prosthetic arm was built.

This is the second chamber of the heart. And it gets there by passing through the 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.

The main valve is turned off.

Here you've got the aortic valve.

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.

And this valve and all valves in the heart are basically there to keep blood moving in the right direction.

And the fact that pig heart valves have lots of these on them is the reason that you can't transplant a pig heart valve into a person easily.

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.

This is a really basic, basic prosthetic limb under here.

It's the development of a prosthetic device for treating blindness.

Tim uses his thoughts to control an advanced prosthetic arm.

Tim uses his thoughts to control an advanced prosthetic arm.

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.

So, the most beautiful thing I found at least what I think is the most beautiful in the book, is this heart valve.

Great and then I didn't hear from them for weeks, so I called, and I asked, What's going on with the heart valve?

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

The low tech bit is that it's literally a pig's heart valve mounted in the high tech bit, which is a memory metal casing.

A prosthetic limb doesn't represent the need to replace loss anymore.

That guy who smuggled heroin in his prosthetic leg? Yeah, him.

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