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Uzzy Umbrellabird did not understand. “Why not, Utley?
” asked Uzzy.
Underwater Utley explained, “Unfortunately, Uzzy, you
do not have gills. Fish, like all other animals, breathe
oxygen. Fish have gills that allow the oxygen to pass
from the water into their bloodstream. Uzzy, as a bird,
you get oxygen through your lungs.”
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