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

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.

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

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

And so when I draw these two, I really wnat you to just think of the two sides, veins coming from both sides.

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

And I hesitated there just to make sure I got that because it's taking blood away from the heart.

I'll write that right here.

Into the IV, yes.

I can't really show blue on blue, but you know, just try to see they kind of go there.

Here you have our tricuspid valve. And I'm gonna label it just as 'T'

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 blood is headed towards the lungs, going first through the trunk, and of course after the trunk, there is left and right I write that up here pulmonary arteries are next.

Engaging quarantine.

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

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 mean, you knew you were going to be caught here. In the quarantine, yes.

Oh, very well then, I'll ring up the isolation ward.

And actually here I'm gonna make the point that there aren't just two pulmonary veins, one for each lung.

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

And I've drawn it as one tube with no split and this is the pulmonary trunk. Pulmonary trunk.

And then on the other side where the veins are bringing blood back to the heart most of the blood as it turns out, most of the blood actually goes this way into the pulmonary veins.

Please help him.

You just bought yourself a night in the quiet room!

Simms put Kristen in the quiet room for the night.

We're looking at a 200meter quarantine.

Quarantine protocol complete.

And it generally travels through two major kind of vessels.

I'm going to do some surgery here.

And remember I call them arteries, because they're going away from the heart. And there are two arteries, so pulmonary arteries left and right pulmonary arteries.

And It's again stopped a little bit there, but I can fill it in and the pulmonary veins are gonna deliver that oxygenated blood to the left atrium.

301 to 306. We are confirmed go for a State of the Union lockdown.

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

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

I'll be back. This is the isolation ward.

There's a quarantine on the town.

Take her to the quiet room and sedate her.

We'll all be in the quiet room.

Isolate that ship.

Entering the quarantine zone.

They may also need to be quarantined.

What's in that biohazard room?

Quarantine area breach.