The answer varies from one individual to another and depends on how deeply they breathe.
Slightly less than 1% of the air that you breathe in.
We get rid of waste when we breath out and when we breath in we take oxygen in to our lungs and breath.
Your breath. Take a dump.
At higher altitudes, the air pressure is lower. Therefore each breath you take contains less oxygen.
None, there is air at the top of Everest and that air has just as much O2 in percentage terms (20%) as the air at sea level. The problem is that the pressure of the air at the top of Everest is much much less (4.89 psi) than the pressure of the air at sea level (15.48 psi). This means that in each breath you take there is less O2 in comparison to a lung full of air breathed in at sea level, you will need to take 3 breaths on the top of Everest to get as much O2 as one breath at sea level,
All of the air in the lungs gets exchanged with oxygen upon each breath. We exhale carbon dioxide and inhale oxygen.
Yes. You take in air which is about 20% oxygen
Yes. You take in air which is about 20% oxygen
True
The diaphragm squeezes the air out of your lungs
Oxygen flows into your blood when you breath April:)
Not being able to take a deep breath is not always considered shortness of breath. If you are exerting yourself, where you need more air but can't take a deep breath, you would have a shortness of breath.