Made in the USA by Nasco, this unique heart model can be opened to allow inspection of the chambers and the valves, allowing for in-depth student study. The texture of the heart, both inside and out, has been duplicated with remarkable realism. Squeezing the heart allows students to feel some of the differences between the ventricles and atria. The valves and ventricular chambers are visible by flipping the cardiac skeleton forward. Students can also use the replica to identify various parts of the heart. The model is accompanied by a useful teaching guide. The product is backed by a 5 Year warranty through the manufacturer as well.