The oxygen we inhale is absorbed in the alveoli, tiny air sacs in the lungs, where it diffuses into the bloodstream to be transported to the rest of the body.
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The oxygen we inhale is absorbed in the alveoli, tiny air sacs in the lungs, where it diffuses into the bloodstream to be transported to the rest of the body.
The oxygen we inhale is absorbed in the alveoli of the lungs. These tiny air sacs have thin walls lined with simple squamous epithelium, allowing oxygen to diffuse into the surrounding capillaries and enter the bloodstream.