it contracts, pulling downwards to increase the volume in the chest.
yes they help us breath in the air we breath i read about it somewhere
They help us because they give off the air we need to breath. They help us because they give off the air we need to breath.
you breath daaa. who doesnt know that? lol
The help us breath when we help them live.
Help us to breath.
There is a diagram that can help understand. The diagram is in an argument.
Our lungs help us breath and they let us live.
Well, obviously, oxygen helps us breath as it is the thing we breath. If there was no oxygen, we wouldn't be able to breath, therefore, we would all die.
Trees are resources and they help animals breath just like they help us.
they hel people breath :p
trees may help us in the future because we will need to get oxygen to help us breath in the future because of pollution... etc.
The way a tree can help u because it ablse you to breath and live