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Neural tube closure captured mid-fold in a cutaway block of embryonic tissue, with two raised neural folds curling toward each other along the top. Beneath them, the layers show finely ridged edges, a honeycomb band of packed cells and a spongy base of loose tissue. Paired somite bumps run alongside the groove. A detailed piece for embryology and developmental biology lessons, a bioelectricity talk or a science classroom display.

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