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Oxygen's highest level is 100%. Oxygen's lowest level would be 20%.
Well, when drowning, the lungs are being filled with water. This water replaces the necessary oxygen to keep you alive. If you take no breath, all the oxygen is used up and without oxygen...death. Hope this helps. :)
In a way, yes, if there is not enough oxygen getting to it, and there is an excess of non-vital fluids in your bloodstream, your brain could be considered as drowning. Alternatively, if you are inhaling gas that is not oxygen, or another fluid that is not oxygen, your brain could be considered as drowning.
drowning and choking
Oxygen has the lowest boiling point of these. It is far below the boiling points of the others.
Tsunamis kill people by drowning them, due to no oxygen, just water.
Oxygen .
of Drown
You have low concentration of oxygen in the veins. It is low in right side of the heart. It is supposed to be the lowest before it enters the alveoli of the lungs.
vena cava
No. It is very high.
Damage to the brain from what? Drowning? lack of oxygen? Or what happened to you when you were answering this question?