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A five week human embryo curled into a C shape. It shows the large forebrain bulge, a round eye, stacked pharyngeal arches below the head and the swelling of the heart beneath them. Small limb buds sprout from the side, segmented ridges run along the back, and a curved tail finishes the coil. The ribbed texture makes each developing structure easy to point out. It is a hands-on biology model for embryology and developmental biology lessons, comparative anatomy units, or a science teacher's display shelf.

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