Breathing is all about moving air from a higher pressure to a lower pressure environment.

I was freezing to death,

It's just pure mechanics, allowing you to cycle air through this breathing loop.

The baby was delivered through a C section, but Barbara suffered cerebral anoxia, a loss of oxygen to the brain.

Oxygen, people.

We need to administer oxygen.

Trees give off oxygen and absorb carbon dioxide.

They gave her medications to raise her blood pressure.

Oxygen is taken into our lungs when we breathe.

Aside from breathing oxygen... it doesn't seem to me that...

Oxygen! Yes!

So the wiggly lines at the top, all the colors, this is the normal sort of data you would see on a monitor heart rate, pulse, oxygen within the blood, and respiration.

It's likely that as you became more nervous, the tension in your body increased, and your breathing quickly sped up.

By decreasing the surface area of the airways, you're increasing the pressure of oxygen moving from the alveoli to the blood.

So nature created a balance, and the balance was called animals.

When the ocean absorbs a lot of CO₂, the water becomes more acidic.

Breathe, breathe!

It's palladium.

The air we breathe consists of oxygen and nitrogen.

If you think about the way we breath, we inhale oxygen, we exhale carbon dioxide, but what if you can't exhale?

Every one of us impacts the world around us everyday, and you scientists know that you can't actually even if you stay in bed all day, you're breathing oxygen and giving out CO2, and probably going to the loo, and things like that you're making a difference in the world.

They are actually red that's what gives blood its color.

I spent a lot of time learning about the physics and physiology of diving and how to overcome these limitations.

This was a pure O2 static apnea record that Guinness had set the world record at 13 minutes.

Breathe.

We take a breath every few seconds.

My next step's gotta be oxygen.

Is he breathing?

Deep breaths. SHERRI INHALES

Breathe.

Breathe.

Breathe deeply.

But the thing is it also releases millions of years worth of stored CO2 back into the air.

What's a drug?

There are three basic limitations of scuba diving.

This isn't Volvos this is volcanoes.

But if our bacteria did not evolve to break down phthalates, they would have used some other kind of carbon source, and aerobic respiration would have led it to have end products such as carbon dioxide anyway.

That's what we use to inject, as we start to do our deep dives.

We need to breathe.

These granules contain three essential plant nutrients.

This was a different record.

Breathe deeply. Come on, breathe deeply.

Living tissue over metal endoskeleton.

So I closed my eyes,

Respiratory arrest. Turn it around!