False col SEM of lung

False col SEM of lung

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Credit: MOREDUN ANIMAL HEALTH LTD/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of a section of healthy lung tissue, showing the microscopic air sacs (alveoli) where gas exchange takes place. The walls of the alveoli contain many tiny capillaries carrying carbon dioxide-rich blood from the heart. As the blood passes through the capillaries it absorbs oxygen and releases its stored carbon dioxide. Magnification: x133 at 35mm size.

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Keywords: alveolus, anatomy, human body, lung, lungs, respiratory system

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