The walls are covered with villi where nutrient absorption takes place.

A blood vessel burst inside his brain.

You place the muscle cells on the outside.

In this example here, it's an artery.

So this thrombus right here is going to make it harder for the blood to flow through this vessel.

It goes around the ventricle and, as I showed you in the beginning, also around the atrium. It goes all the way up and covers both the left and right side.

This is a heart stent developed by Zhong You at Oxford University.

It's gonna come down let's say, this way, through the arterial, and let's say some of the blood is gonna continue down this way, maybe to another capillary bed.

The revolution is called angiogenesis, and it's based on the process that our bodies use to grow blood vessels.

Or we can build endoscopes that can see deep inside the body around occluders, and also for cardioscopes.

We can do this because tumor blood vessels are unlike normal, healthy vessels we see in other places of the body they're abnormal, they're very poorly constructed, and because of that, they're highly vulnerable to treatments that target them.

The smallest blood vessels are called capillaries.

Blood flows through blood vessels.

It's gonna be going initially through a giant vessel.

And the capsules in her blood stream.

So we thought the patient might actually want to know the context as well.

And this is an X ray showing you the patent, functional blood vessel.

Blood runs in the veins.

This is the final boarding call for Orly, flight 180, with service to Paris...

Internal haemorrhaging.

You know, where did these things come from?

And the Arotic valve is going to be what divides the left ventricle from this giant vessel that we talked about earlier.

So you can imagine if you have these things build up, it's narrowing the actual vessel that's supplying blood downstream from that obstruction.

This will avoid contamination of the waycover seals with the sticky residue

Shut your mouth!

So the body has the ability to regulate the amount of blood vessels that are present at any given time.

This is your final boarding call for Flight 3972 to Chicago.

If you had an acute congestive heart failure, they could bleed a pint of blood from you by opening up an arm vein, giving you a crude leaf preparation of digitalis and then giving you oxygen by tent.

like red blood cells.

(Laughter)

Subdural hematoma.

And this outer layer, this is the vasculature, which is incredible, around a human brain.

Thrombosis is the process of a thrombus forming.

You'll have bleeding for a few hours.

End to end, that would form a line that would circle the earth twice.

So where is the blood gonna go?

So, let's say we follow just the left leg, so this artery over here on the top, it's gonna get a little bit smaller, and maybe I would call this a medium sized artery by this point.

Let's start clean up.

I'll write it out again because I want to make sure we see clearly the difference between someone with compliant blood vessels and someone with non compliant vessels.

Hopefully I'm not confusing too much these medical terms confuse ME a lot but I want to make it very clear, thrombosis is formation of a blood clot inside of a blood vessel than can restrict the flow of blood.

So, all these guys over here, these are the true capillaries.

So let's zoom in on one of them....Maybe we can zoom in right over here, that part of the artery.

All the sudden you could have these clotting factors form a clot right over here right at the actual plaque.

But there was something left.

Then you start to take a look at adult life.