Lungs 101 | National Geographic

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The lungs replenish the body with life-giving oxygen. Learn about the anatomy of the lungs, how the organs make respiration possible, and how they are vulnerable to illnesses.

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national geographic

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National Geographic

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Source: National Geographic

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National Geographic

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Source: National Geographic

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Source: nationalgeographic.com

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National Geographic Photos

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Around the World / Amazing Places

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Amazing Nature Wallpapers

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Amazing Nature Wallpapers

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Nature Full HD Wallpaper

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The Sacrifice of Cassini | Cosmos: Possible Worlds

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Explore the creation of planetary rings with Neil deGrasse Tyson and discover the fate of the Cassini space probe.

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Nature Full HD Wallpaper

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Nature Full HD Wallpaper

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Nature Full HD Wallpaper

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Nature Full HD Wallpaper

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Nature Full HD Wallpaper

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Nature Full HD Wallpaper

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Nature / Around the World

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Landscape

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Around the World / Amazing Places

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Bat

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