DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Diseased lung. Light micrograph micrograph of a section through a lung from a patient with heart failure. Someo f the alveoli (tiny air sacs, white) have become enlarged and the wall separating them are damaged. This would reduce the surface area for gaseous exchange and therefore restrict oxygen uptake. Magnification: x3 when printed at 10 centimetres wide.
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