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A half-open artery model shows how atherosclerosis narrows a blood vessel from the inside. The cutaway runs along a ribbed tube, so you can see the layered vessel wall in section, the lumpy fatty plaque pressed against the lining and the tightened channel where blood would flow. Segmented bands wrap the outer wall, and textured tissue fills each cut face. It makes a clear teaching piece for an anatomy or health class, a handy prop for explaining heart disease to patients, and an unusual display item for anyone who likes realistic organ models.

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