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Oxygen is necessary for the muscles, tissues, and organs in your body. It is also extremely important for the brain to function, as a prolonged period of not-enough oxygen to the brain will result in brain damage and more severely brain death.

When you breathe, the Oxygen is inhaled into your lungs where it diffuses into the blood oxygenating the blood that is lacking oxygen as your heart pumps this non-oxygenated blood to the lungs.

Once the blood has been oxygenated by the lungs, the heart continues pumping this blood throughout the body and delivers the oxygenated blood to the various tissues, muscles, and organs in your body.

Then this blood is no longer containing oxygen, so the heart continues to pump it back through the heart and to the lungs to be re-oxygenated. And the cycle continues with each breath you take...


Oxygen is needed in the reformation of Adenosine Triphosphate (ATP) from ADP in the body. ATP is used in metabolic processes as an energy source and is therefore required for life.

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