And it generally travels through two major kind of vessels.

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

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.

I'll write that right here.

Into the IV, yes.

And it came up in the right atrium from a giant vessel up top called the superior vena cava. And this is a vein of course because it's bringing blood towards the heart.

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

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

So Superior Vena Cava and Inferior Vena Cava.

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.

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.

Start a largebore IV. Keep it open.

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

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.

And then it's gonna come out on the other side, in the pulmonary veins.

I'm going to do some surgery here.

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

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

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

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

Carbon dioxide is exhaled... and oxygenated blood continues passing through the veins... into the left auricle... through the left ventricle, passing out again.

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

They would ordinarily support fish and other wildlife.

And fortunately he didn't die.

So you think of alternative mechanical parts.

She was being given medicine intravenously.

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.

Something stiffened inside me.

Let me see Chekhov pull that off.

Maybe from the second toe, and it's gonna basically all kind of gather together, and again, to a giant, giant set of veins.

I need two largebore Ivs, 6 units Oneg, type and cross for 6 more units,

And it is based on an old model.

A little vein in his head popped, and that was that.

I hope my veins don't pop.

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

You know, maybe veins are dumping in here now, maybe another vein dumping in here, and these veins are all going to dump into an enormous vein that we call the inferior vena cava.

And anytime I mention the word vein, I just want to make sure you think of blood going towards the heart.

Have you made your peace?

The Balkan Mountain range runs across Bulgaria from west to east.

And it's actually coming into two veins, the one at the top, this is called the superior, superior just kind of means at the top.

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

Lock device while accessed

let's say dumped into the air and the same on this side, and it's gonna come from their head and all three sources two arms and a head are gonna come together into one big vein

Then I have been walking East for 20 years from Eastern Europe to Central Asia through the Caucasus Mountains,