And let me actually show you where the blood vessels come from. These are called coronary vessels I just write the word coronary here.

I'm going to do some surgery here.

I could just write artery and vein and essentially they would be behaving this way.

This is now going to dump into what we call a venule.

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

So these two veins, the superior vena cava and the inferior vena cava, are dragging the blood back to the heart, and, generally speaking, these are all considered, of course, veins.

Well, these vessels, all of them, together are called coronary vessels.

I'll write that right here.

Into the IV, yes.

And you might say, well that wasn't so difficult. I'll say bronchial vessels, because there are also some veins coming off.

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.

There's also another one over here called the superior vena cava, and this is bringing back blood from the arms and head.

So you have these arteries right over here, the red tubes. Those are arteries. and then the blue ones are veins.

So, here you have a giant vein, this is a vein, and you have an artery.

His vitals are spiking.

Inferior vena cava, and this is the large vein that brings back all the blood from the bottom half of the body.

And at the bottom here, you can't see it because it's on the other side of the heart, but there's another vein called the inferior vena cava.

And it generally travels through two major kind of vessels.

Now, to start the journey, it's gonna have to out of the left ventricle and into the largest artery of the body.

Start a largebore IV. Keep it open.

Artery up here, artery over here, and then vein in the other two spots.

So if I was to make a volume pressure loop, with this, I could actually erase the word 'balloon' and 'bubble' and replace them completely with 'artery' and 'vein',

Right it's gonna have to go away from the heart. So that's the aorta. The aorta actually has the little arch like that.

You cover up the vein, you do the same thing, you have one tiny opening here, and this opening, let's have it go down so it looks the same, and this opening is to a bicycle pump.

A venule, and this venule is gonna basically then feed into many, many other venules.

It doesn't have any veins.

Coronary vessels So, coronary artery and vein.

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

And on the right you actually see a carotid artery that was engineered.

I think she cut both arteries. I could hardly feel her pulse.

And it sends off one vessel to the arm, one vessel up this way, the vessel over this way and then this arch gonna go down and splits like that.

Remove the ties that bind...

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

Smelling salts.

If the artery gets nicked, how long do i have?

So with the same amount of pressure you see a difference in the volume, and this is actually a critical point, because the artery and the vein really are behaving just like the balloon and the bubble, and it's actually very very similar.

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 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.

They're taking the de oxygenated blood away from the tissue of the heart.

So Superior Vena Cava and Inferior Vena Cava.

They would ordinarily support fish and other wildlife.

And fortunately he didn't die.

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

He's dying. Coronary blockage.

Remember the heart itself is a muscle. It itself needs oxygen.