How Does Oxygen Enter the Bloodstream?


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?"
you breathe it in.
Tiny sacs in the lungs called alveoli, alveoli are particular to mammalian
A few seconds. Blood has to get from the lungs, where it is oxygenated, back to the heart, which takes a couple of beats. Then it has to be pumped up to the brain, which takes a few
So, a person breathes in. That oxygen follows the path of the bronchi, the bronchioles, and finally the alveoli. This is the tissue that makes up most of your lungs, and looks like
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