Is oxygen a waste gas?

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Simply so, is carbon dioxide a waste gas?

The way we breathe, moving gas in and out of our lungs is for proper oxygen acquisition and proper CO2 distribution. Far from being a waste gas, CO2 regulates many body processes. Low amount of CO2 in the alveoli of the lungs has negative impact on all 3 phases or respiration.

Also, why is oxygen an important gas? Oxygen is essential for respiration because the body uses it to 'burn' food molecules. Animals take in oxygen when inhaling and give off carbon dioxide when exhaling. Oxygen makes up almost 21% of the total gases in air, with most of the remaining gas being physiologically inert nitrogen.

Also question is, is oxygen a dry gas?

From a meteorological perspective, dry gases are all the gases that make up our atmosphere with the exception of water vapor, e.g., nitrogen, oxygen, carbon dioxide, argon, methane, etc. From a chemical perspective, dry gases are any gas or gas mixture that neither contains, nor is contaminated by water vapor.

What type of gas is oxygen?

Oxygen is also a pure gas because it is made of one type of item; however, it is an elemental molecule. Pure gases may also be compound molecules, which are comprised of a bunch of different atoms. For example, carbon dioxide would be considered a pure gas but it is also a compound molecule.