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How Does Oxygen Enter the Bloodstream?

Answer

Oxygen enters the bloodstream through the air we breathe. First it goes to the lungs where it is absorbed by capillaries. From there it enters the bloodstream.
Q&A Related to "How Does Oxygen Enter the Bloodstream?"
Tiny sacs in the lungs called Alveoli.
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Explore this Topic
Oxygen enters the bloodstream during breathing. In the lungs, the oxygen reaches structures called the alvioli. They facilitate transport from the outside of the ...
Alveoli (air sacs) are very thin walled to reduce the distance that oxygen in the alveoli or carbon dioxide in the blood has to diffuse. They are also very richly ...
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