*respire
There is not much oxygen
without nitrogen our bodys would over oxygenate (get to much oxygen). nitrogen is important for plants, after all they breath in nitrogen and breath out oxygen.
breath in breath out breath in breath out
animals usually depend on plants for oxygen. we breath out carbon dioxide and breath oxygen in, same with animals. and plants breath that carbon dioxide in and and breath out oxygen.
we breath in oxygen and plants breath co2
fish have gills to breath so yeah
We get Oxygen from atmosphere.It is in air we breath.
Yes. All humans breath a type of air called oxygen. Without oxygen we would die.
The astronauts breath as they have an oxygen tank which they keep attached with their space suit.
Gills are more efficient at obtaining oxygen, but there is much more oxygen in air to breath through the lungs.
yes, all insects breath oxygen in and carbon dioxide out (as do all animals)
hi, as we breath in we breath in about 20% oxygen, we breath out 16%.. we only use about 4% of the oxygen we breath in..