Very, very temporarily--your blood carries it to your lungs, where you exhale it.
All activities release carbon dioxide in the blood stream. As long as you are alive, your cells will continue to produce carbon dioxide. Even resting or sleeping will not stop it.
increase of carbon dioxide in the tissues and the bloodstream
lungs .
it is transmittid from the brain
The LUNGS
To deliver oxygen to the bloodstream and to remove carbon dioxide from the bloodstream.
The carbon dioxide is exhaled.
most carbon dioxide in the bloodstream is transported as bicarbonate through the blood back to the body
I wouldn't exactly characterize it as separating carbon dioxide and oxygen, however, I think the answer you are looking for is the lungs which takes up oxygen into the bloodstream and expels carbon dioxide out of the bloodstream into the lungs so we can breathe it out again.
carbon dioxide can not enter the bloodstream through the air scars because if it does there would be a hard time to breathe carbon dioxide doesn't have to do with anything about the air scares in the breathing area
Carbon Dioxide
Diffusion.