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.

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

I'm going to do some surgery here.

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

And it generally travels through two major kind of vessels.

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

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

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

let's start at the one o'clock position, there's tubuliform silk glands, which are used to make the outer silk of an egg sac.

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

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.

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',

The plant is leaking into the Pacific Ocean extensively.

So Superior Vena Cava and Inferior Vena Cava.

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

He's dying. Coronary blockage.

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.

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

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

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,

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 the most studied silk line of them all major ampullate silk.

You have to explain what you're doing and how the developmental events of a tadpole are, of course, very observable and they use the same T3 mediated hormones that we do.

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.

When he shouted, the veins in his neck stood out clearly.

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

Officially, they're characterizing that it was a coronary brought on by systemic shock.

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.

Or from the point of view of the person whose heart it is, it's on the left.

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.

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.

This right over here is called the left coronary artery or LCA.