2006-06-12 13:41:29 · 8 answers · asked by kira 2 in Science & Mathematics ➔ Chemistry
Well, if we didn't need to use the oxygen in it, we wouldn't bother to breathe. So that's what happens to it: the oxygen (or some of it) is removed by the lungs, and what's given back therefor has less volume.
2006-06-12 13:46:51 · answer #1 · answered by auntb93again 7 · 0⤊ 1⤋
They don't, in fact it is normally quite the opposite. Because exhaled air is warm and humid it occupies a greater volume than the cold dry air that was inhaled. In normal ventilation the average exhaled volume slightly exceeds that inhaled.
respiratory volumes vary greatly depending on activity and environment. Any given expiration may contain more or less gas than the previous inspiration.
2006-06-12 13:50:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋
By mass, you exhale more. The oxygen you inhaled some time ago comes out as CO2. mass 32amu goes in, mass 44amu comes out. Most of the N2 and a lot of the Oxgen goes in and comes right back out.
2006-06-12 13:49:33 · answer #3 · answered by metaraison 4 · 0⤊ 0⤋
every minute you breath in 13 pints of air into your lungs but you do not exhale air as you say you exhale carbon dioxide which plants use and convert back into air again .so you take in air and expel carbon dioxide in equal amounts .
2006-06-12 13:51:21 · answer #4 · answered by leonard24seven 4 · 0⤊ 0⤋
We inhale both oxygen and carbon-dioxide. We exhale only carbon-dioxide because our body uses the oxygen.
2006-06-12 13:47:03 · answer #5 · answered by anonymous 3 · 0⤊ 0⤋
bcuz when we inhale oxygen it is comusmed by the body........and a smaller amt of carvon dioxide is released
2006-06-12 13:49:06 · answer #6 · answered by kara 5 · 0⤊ 0⤋
They really don't.
Oxygen is absorbed by the lungs but the change in quantity is immeasurable.
2006-06-12 13:44:16 · answer #7 · answered by Anonymous · 0⤊ 0⤋
If you were to be able to completly empty your lungs they would collapse.
2006-06-12 13:45:10 · answer #8 · answered by Anonymous · 0⤊ 0⤋