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your answer
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Are there any parts of the human body that get oxygen directly from the air and not from the blood?
Category: Biology Published: June 25, 2015
anatomy of the human eye
Anatomy of the human eye. Public Domain Image, source: Christopher S. Baird.
Yes. Upper-layer skin cells and the cells in the front surface of the eyes get a significant amount of oxygen directly from the air rather than from the blood. Human bodies have a huge demand for oxygen. As a result, the oxygen that is able to passively diffuse into the body directly from the air is not nearly enough to run the whole body. Fortunately, we have lungs that
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