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How air is exchanged in the lungs

How air is exchanged in the lungs
This figure depicts how oxygen (O2) and carbon dioxide (CO2) pass between the alveloi (inside the lung) and the capillaries (the blood stream).
Reproduced with permission from: Anatomical Chart Co. Copyright © 2008 Lippincott Williams & Wilkins.
Graphic 58392 Version 2.0