Air- with a lot of carbon dioxide and water vapor.
Carbon dioxide is the waste product exhaled from the lungs during respiration.
The carbon dioxide is exhaled.
Carbon dioxide is a waste product of cellular respiration; it is exhaled through the lungs into the outside environment.
co2
CO2 Carbon dioxide
To the lungs, to be exhaled.
Carbon dioxide is exhaled
Carbon Dioxide
Mainstream Smoke
It needs to get oxygen from the lungs, or drop off carbon dioxide to exhaled out of the body.
If, when you exhaled, all the air in your lungs escaped you wouldn't receive a substantial amount of oxygen to nurish your lungs or your body for that matter.
The muscles in your diaphragm contract to push the air out of your lungs.