our lung contracts and carbon di oxide goes out
Breathe in; breathe out
so you can get oxygen in your body
the lungs will moves down when breathe out air
Expired air is air that you breathe out of your lungs.
That is where it breathe in water and if you blew air into its gill you would drown it in air
The air that you breathe out mixes with the rest of the air in your general vicinity, and will eventually mix with all the air in the Earth's atmosphere.
We draw air into, and expel out of, the lungs.
All that happens in the humans air sacks is that the air that u breathe gets stored up in there
bahaha umm? you cant breathe, then you die!
The lungs act a bit like baloons. When you breathe in they will inflate, when you breathe out they will deflate. Using a balloon may be useful way to understand this, breathe into the balloon and it will inflate (this is what happens when you breathe in). Next, leave the air out (slowly) and this is what happens your lungs when you breathe out.
You inhale them but your lungs only absorb the oxygen- they are exhaled again when you breathe out.
air gets thinner > harder to breathe