If we breathe out carbon dioxide why does CPR work?
In: Biology
The main reason isn’t the breathing, it is because you are pumping their heart for them, when it has stopped or isn’t working properly.
The cells in your brain use the oxygen in the blood cells already beside them almost immediately they are in contact. By pumping the persons heart, you move those empty blood cells away and push new blood cells that still have oxygen in them into place. The oxygen already in your blood before you stopped breathing is enough for a few minutes.
After that, the air from your lungs still has enough oxygen in it, that it is able to give enough oxygen to the empty cells to keep you going even longer. When you breathe out, you breath out 3/4 of all the oxygen you breathe in, and only take out 1/4.
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