I'll write that right here.

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

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.

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

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.

Into the IV, yes.

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.

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.

So Superior Vena Cava and Inferior Vena Cava.

Start a largebore IV. Keep it open.

I'm going to do some surgery here.

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.

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.

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 you've got another vein from the other lung kind of following a parallel path and going into the veins, as well.

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,

It's almost like another generator came online, jacked into the system and overloaded it with double or triple the voltage.

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.

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.

But it won't slow down.

Pulse ox 80. We're dropping!

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.

(People yelling)

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.

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

Lie down on your left side.

And down here the inferior vena cava.

And you can see, it's lumpy bumpy.

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.

No. No.

So the thread of discovery that we have really is a thread.

It's going to end up at the, maybe I should draw it here, it's ending up with the right atrium. That's just the name of the chamber where the blood ends up in.

My lower abdomen feels bloated.