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Whales are voluntary breathers, meaning they think about each breath they take. Since they don't have gills, they need to come to the surface to breathe out of the blowholes on top of their head. When the whale comes to the surface, it exhales all the old air in its lungs and then inhales, filling its lungs up to about 90% of their capacity (we only use 15-30% of our lung capacity.) the whale's exhalation is called the "blow," or the "spout."

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14y ago

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