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17_A01 17_A01.swf |
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| Title: | Web Tutorial 17.1 Gas Exchange in the Lung and Tissues |
| Caption: | When we inhale, oxygen enters the lungs, diffuses into the bloodstream, and is carried to tissues throughout the body. When we exhale, the bloodstream carries carbon dioxide from the tissues back to the lungs, where it is expelled. This tutorial illustrates the breathing mechanism and the processes of gas exchange in the lungs and in the body tissues |