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Photo Gallery: Lungs
PREVIOUS8 of 10NEXT
Photo: Beijing cyclist has his blood oxygen content measured
Photo: Man in mask surrounded by volcanic ash and smokePhoto: A resin cast of lungsPhoto: A teenage girl wearing a mask in bedPhoto: Chinese man with neck lesionsPhoto: A firefighter backlit by nighttime flamesPhoto: Rickshaw driver wearing a thin surgical maskPhoto: Gem miners working by candlelightPhoto: Beijing cyclist has his blood oxygen content measuredPhoto: Scuba diver amid farmed salmonPhoto: Goggled swimmer exhaling bubbles underwater
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Long-distance cyclist undergoing tests, Beijing, China
Photograph by Michael Nichols

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