why do people breath?

I found an answer from www.blf.org.uk
Why do we breathe? | British Lung Foundation
Every part of your body needs oxygen to survive. Find out what makes us and breathe and how we do it.
For more information, see Why do we breathe? | British Lung Foundation
I found an answer from www.quora.com
Why do people breath deep while asleep and not so when awake ...
Some of the reasons listed below for which we breathe heavily during sleep are as follows:- * Healthy people with no symptoms of any sort of disorder ...
For more information, see Why do people breath deep while asleep and not so when awake ...
I found an answer from www.scientificamerican.com
How Do We Breathe? - Scientific American
May 16, 2019 ... Have you ever wondered how the process of breathing works so smoothly? Our lungs allow us to inhale the oxygen our body needs, but they do ...
For more information, see How Do We Breathe? - Scientific American