Breathing Oxygen

breathing oxygen difficulty medlineplus medical encyclopedia difficulty may involve difficult uncomfortable feeling like you are not getting enough air

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gas wikipedia the free encyclopedia o 2 must be present in every gas this is because it is essential to the human bodys metabolic process which sustains life benefits page 1 2 3 benefits of all the essential nutrients needed by the human is the one we must have on a moment to moment basis wikipedia the free encyclopedia is the process that moves air in and out of the lungs or through other organs such as gills for organisms with lungs is also