Lung Tissue (IMAGE)
Caption
These microscopic images of lung tissue from newborn mice show a cross section of the alveoli, the buds in lungs where air exchange takes place. The air sacs (white) in the alveoli on the left, which were taken from a normal mouse, have expanded fully, indicating the animal could breath normally. Those on the right have failed to expand, because the mouse suffered from a new respiratory syndrome discovered by Salk scientists.
Credit
Courtesy of Salk Institute for Biological Studies
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