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

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

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

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

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

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.

I'll write that right here.

Into the IV, yes.

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.

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

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

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 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.

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.

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.

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

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.

You know, I think maybe you will. One forty five over 70 with a pulse, 80.

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

And it generally travels through two major kind of vessels.

I'm going to do some surgery here.

You can see the atrium and the ventricles, how blood flows to our arteries and veins.

Well, if Dr. Takada was a bit too fond of his Scotch, what I'm seeing here is oesophageal varices, and this tear caused blood to enter his oesophagus, causing him to vomit blood.

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

BBL's a liter in the field and only one PIV.

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

I mean, you've got red ones, and blue ones, and the blue ones are the veins, and the red ones are the arteries but are they part of the systemic flow, or pulmonary flow, or something else?

And the veins actually drain into a spot , directly into the right atrium.

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

Stay clear of the hepatic artery.

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

Will they not hear? What, ho! you men, you beasts, That quench the fire of your pernicious rage

They would ordinarily support fish and other wildlife.

And fortunately he didn't die.

This is an arterial, right.

So you think of alternative mechanical parts.

She was being given medicine intravenously.

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

So Superior Vena Cava and Inferior Vena Cava.

This led me to blood.

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

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

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