ashok mourya
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Yes, cows do exhale oxygen and in fact, all of us do too. I'm sure the textbooks don't tell you, or perhaps it's a layman term that we inhale oxygen and exhale carbon dioxide.
See, the thing is when we inhale, we are actually inhaling air that comprises of 75% Nitrogen, 20% Oxygen, 2% Water vapour, 0.040% Carbon dioxide and the rest for the rest of the gases. When we inhale that air, our lungs only absorb most of the oxygen but not all. This is a common misconception that people make when they think that all of the oxygen is absorbed into the bloodstream. The remaining oxygen comes out as exhaled air but in very small amounts.
This is the same case for the cow, except that the cow's lungs are not able to absorb oxygen as efficiently as our lungs do. This means that the amount of oxygen exhaled will be much more significant. This is only when people notice that a cow exhales oxygen when in fact all of us do.
See, the thing is when we inhale, we are actually inhaling air that comprises of 75% Nitrogen, 20% Oxygen, 2% Water vapour, 0.040% Carbon dioxide and the rest for the rest of the gases. When we inhale that air, our lungs only absorb most of the oxygen but not all. This is a common misconception that people make when they think that all of the oxygen is absorbed into the bloodstream. The remaining oxygen comes out as exhaled air but in very small amounts.
This is the same case for the cow, except that the cow's lungs are not able to absorb oxygen as efficiently as our lungs do. This means that the amount of oxygen exhaled will be much more significant. This is only when people notice that a cow exhales oxygen when in fact all of us do.