1
It separaties oxygen from the rest of the gases in the air
2
It distributes the oxygen and useful substances to your entire body and collects harmful substances
3
It eliminates the harmful substances from our
4
It transforms food so that our body can use it
5
Is the way get oxygen
6
Is the way the substances that we get from the air and fod reach all the different parts fo the body
7
Is the way in which we eliminate the waste products in the blood
8
Is the way the body gets the substances it needs from the food we eat.
