When you blow up a balloon with your mouth, you're putting oxygen and carbon dioxide into it.

Gases are produced, a particular mixture of oxygen and carbon dioxide.

They loose their nucleus in order to focus entirely on carrying oxygen and carbon dioxide.

These can be compared to the original volume to calculate the percentage of oxygen and carbon dioxide in the air.

In other words, not all the air in each breath is available for the exchange of oxygen and carbon dioxide.

A test of the levels of oxygen and carbon dioxide in the blood.

Red blood cells carry oxygen and carbon dioxide around our body.

By the Cisuralian, both oxygen and carbon dioxide had recovered to more normal levels.

Why can't we just breathe oxygen and carbon dioxide for us to live?

Otherwise, they said, tests show that the man's lungs are exchanging oxygen and carbon dioxide well.

When you blow up a balloon with your mouth, you're putting oxygen and carbon dioxide into it.

Gases are produced, a particular mixture of oxygen and carbon dioxide.

They loose their nucleus in order to focus entirely on carrying oxygen and carbon dioxide.

These can be compared to the original volume to calculate the percentage of oxygen and carbon dioxide in the air.

In other words, not all the air in each breath is available for the exchange of oxygen and carbon dioxide.

A test of the levels of oxygen and carbon dioxide in the blood.

Red blood cells carry oxygen and carbon dioxide around our body.

By the Cisuralian, both oxygen and carbon dioxide had recovered to more normal levels.

Why can't we just breathe oxygen and carbon dioxide for us to live?

Otherwise, they said, tests show that the man's lungs are exchanging oxygen and carbon dioxide well.