Fold-out model of the human heart

The schematic fold-out model of the human heart contains the anterior and posterior walls of the heart with openings for the respective vessels, the septum of the heart and the septum between the atria and ventricles with openings for the tricuspid and bicuspid valves, the individual vessels: the superior and inferior vena cava, the four pulmonary veins, the pulmonary trunk branching into the left and right pulmonary arteries and the aorta. It also contains semilunar valves, the aortic and pulmonary valves, and the cuspid valves, the tricuspid and bicuspid valves, which can be inserted into their respective apertures. There are also labels for all the structures that pupils can attach to them.
The model is used to provide a better visual demonstration of the principles of how the human heart works, where blood flows into it, which parts it flows through before it reaches the pulmonary circulation, where it returns from the lungs and which parts it uses to reach the large body circulation. The location of the valves in each respective aperture logically helps to understand their function of preventing unwanted backflow of blood.

If the models do not completely fit together, it is necessary to slightly reduce some parts by 1-2%. This depends on the type of 3d printer and print quality.