And the veins actually drain into a spot , directly into the right atrium.

This is an artery. And blood is actually going through the artery, that way.

So let's get a little more precise with the words we've been talking about, especially with heart disease and heart failure and all of the rest.

And this is of course the aorta. This is my aorta.

So blood is headed towards the lungs, going first through the trunk, and of course after the trunk, there is left and right I write that up here pulmonary arteries are next.

And then on the other side where the veins are bringing blood back to the heart most of the blood as it turns out, most of the blood actually goes this way into the pulmonary veins.

While the heart is not moving the surgeon can reroute blood vessels, the part of the heart muscles where clogged arteries are restricting the flow.

You can see how there are definetely some parallels between how the veins and arteries are set up.

There is actually a little spot right there that they drain in to.

Stay clear of the hepatic artery.

But, actually lungs are kind of interesting in the sense that there is a lot of mixing going on.

And actually it stop there because of my arrows, but you can actually see now deoxygenated blood kind of goes from the right ventricle, through the pulmonary trunk, through the arteries and into the left and right lung.

This is an arterial, right.

And in the last video we saw that one of these clots can go downstream to some point where the arteries get narrow enough so that they actually block the arteries.

You can see the atrium and the ventricles, how blood flows to our arteries and veins.

What's happening between these two, time like here, is that blood is actually squeezing out because the pulmonic and aortic valves just opened, blood is squeezing out and going to the whole body.

And I've drawn it as one tube with no split and this is the pulmonary trunk. Pulmonary trunk.

And then you've got the capillaries, you've got some blood kind of from both places the pulmonary circulation and the blood from the systemic circulation again mixing.

I hold her head and cut its arteria carotis with a knife.

So you've got a couple of arteries that are branching off and these are also part of the systemic circulation systemic circulation.

This vessel I'm gonna label let's say here, as the Aorta.

So let's take a cut through the brain here, and imagine that Beck was hooked up to a SPECT scan.

In concluding the knee exam, it's important to document a neurovascular exam.

I mean, you've got red ones, and blue ones, and the blue ones are the veins, and the red ones are the arteries but are they part of the systemic flow, or pulmonary flow, or something else?

In concluding the ankle and foot exam, it's important to document neurovascular.

It was terribly dangerous. (Laughter)

We can understand functionality. This is really important.

Just a moment, Jethro. Is the needle in his femoral artery, Mr. Palmer?

But this is not as I said in the beginning bad way of thinking about it.

So the first branches go and serve the heart. So it's kind of the first to get systemic circulation blood.

And these two veins, this is also a vein, these two veins are actually dragging blood in from all over the body, into the heart.

In concluding the hip exam it is important to document neurovascular exam.

He had a neck wound that severed his carotid artery, and that made him bleed to death.

You know, I think maybe you will. One forty five over 70 with a pulse, 80.

This is what we call a plaque.

And these are called the bronchial arteries.

And so when people talk about arteries getting blocked or getting clogged, they're talking about the coronary arteries.

His vitals are spiking.

And then, when the heart is ready to pump it back out, it goes into this artery, and the name of it is the aorta.

In fact, the so what is, in the brain, changes in neural activity, the things that make your brain work, the things that make your software work in your brain, are tightly correlated with changes in blood flow.

Resisted digit abduction tests the ulnar nerve.

BBL's a liter in the field and only one PIV.

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

Well, if Dr. Takada was a bit too fond of his Scotch, what I'm seeing here is oesophageal varices, and this tear caused blood to enter his oesophagus, causing him to vomit blood.

Blood flows through blood vessels.