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Opened along one side, this Xenopus tadpole cutaway lays out the inner organs of the African clawed frog larva used in bioelectricity research. A coiled spiral gut, the heart, feathery gill arches and a lobed brain sit inside the smooth body, with bulging eyes up front and a long finned tail marked by muscle bands. Realistic and detailed, it serves biology classrooms studying amphibian development and regeneration, and looks great on a science lover's display shelf.

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