Oxygen Everyone Breathes It In :D
Every animal breathes oxygen, even fish (they obtain it by the oxygen in the water).
Humans breathe in oxygen and breathe out carbon dioxide. Trees "breathe" out oxygen.
Animals, including humans, breathe in oxygen and release carbon dioxide as a byproduct of cellular respiration. This process allows cells to produce energy by breaking down glucose in the presence of oxygen.
On average, humans breathe in about 21% oxygen from the air.
The air that one breathes to keep electrons moving along from the first to the last chemical carrier is oxygen. Oxygen is necessary for all life forms to exist and enable existence. For instance, humans need the trees and plant life because they take in or breathe the carbon dioxide that humans expel, and then expel the oxygen that humans need to breathe in order to maintain life.
It's nose or mouth just like us because it is a mammal as well. It has lungs just like us humans and it breathes just like us.
Breathing is an absolute necessity to life. When a person breathes, the lungs exchanges carbon dioxide for oxygen. Oxygen is necessary for human life.
to live and
A plant breathes in carbon dioxide and breathes out oxygen for humans to breathe up. Plants reduce carbon dioxide by exchanging it for oxygen, so really plants effect the environment but in a good and helpful way. this is why we should not cut too many trees down.
A guppy breathes in oxygen which is actually a process of collecting oxygen from the water it lives in through it's gills.
Whales breathe through a nostril called a "blowhole" on top of their head.