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

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

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.

The plant is leaking into the Pacific Ocean extensively.

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.

And it generally travels through two major kind of vessels.

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.

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.

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

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

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',

I'm going to do some surgery here.

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

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

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

She was being given medicine intravenously.

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 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.

They would ordinarily support fish and other wildlife.

And fortunately he didn't die.

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

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.

So you think of alternative mechanical parts.

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

So ischemia is deprivation of blood flow and oxygen downstream from this right over there.

So Superior Vena Cava and Inferior Vena Cava.

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.

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

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.

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

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

I hope my veins don't pop.

So when Three Mile Island releases some radiation, you'd want to incorporate statistic likelihood of someone getting thyroid cancer in any number.

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

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