And the blood kind of goes through like that.

It's gonna go this way and this way.

Look, it bleeds!

The same blood flows through our veins.

Is there something that's bleeding under my arm?

And then it flows into your left atrium.

Mama, Santa's got a nosebleed.

And that's why in most of your body, your veins that have de oxygenated red blood cells look kind of bluish. And the reason why it changes color is that when the oxygen bonds to the hem sites on the hemoglobin, it actually changes the entire confirmation, the entire structure of the protein. We've see that multiple times.

But what made his nose bleed?

While my blood mingled with yours.

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 these are the two direction the blood is going to be flowing.

If they opened your veins, do you know what would come out?

You can see his wounds, you can see blood flowing.

Actually, they sop about 98.5 of the oxygen. So these red blood cells are just traveling and they're going to go back to the heart. They are what make our blood red.

I greet no one in friendship, save those who share the royal Saxon blood.

As blood circulates through the heart, some of the blood flows into a set of much smaller blood vessels that provide blood directly to the heart.

So it becomes de oxygenated and then it flows back in and to the inferior vena cava, into the vein.

What would be the sense of our struggle? Twentyfive years ago I led execution squads in France.

So now blood comes back this way and this way and dumps into this chamber.

Let 's say blood is coming this way and going that way, and what will happen is that, actually out of the or into the blood, let' s do that first.

Now in the left ventricle, after it's done pumping, it expands and that oxygenated blood flows into the left ventricle.

Each valve is like a one way door that keeps the blood in the heart flowing in the same direction.

The tap is running.

And arteries or anytime I mention the word artery, I want you to think about the blood going away from the heart.

Blood flows from the right atrium to the right ventricle, then it goes to the lungs and from the left atrium to the left ventricle.

It wants to do this it goes like this it goes like this.

Could be water in the gas tank.

There's a big pipe with the blood flowing through it, and around that pipe are the nerves drawing their nutrient supply from the blood.

Blood, blood!

And Free Flows the Nile

The river runs through the valley.

The Malta river flows through the town.

Runs in my blood

I told you the roof had a leak.

And you still put in water.

There seems to be a steady stream flowing in and out over there.

You said, blood, blood.

The river flows through the city.

It never flows naturally

The valve in the bathroom become loose again, water is pouring down.

The valve in the bathroom leaking water again...

A river flows near the village.

My father's blood, my blood.

So I've been all zoomed in here on the alveolus and these capillaries, these pulmonary capillaries let's zoom out a little bit or zoom out a lot just to understand, how is the blood flowing?