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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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INFOTEXT
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1992-09-02
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8 lines
In birds, a thin-walled extension of the
lungs. There are nine of these and they
extend into the abdomen and bones,
effectively increasing lung capacity. In
mammals, it is another name for the alveoli
in the lungs, and in some insects, for
widenings of the trachea.