This model is composed of four parts: atrium, ventricular coronal section, rightatrial appendage and left atrium, and shows the atrium, ventricle, mitral valve,tricuspid valve, aortic valve and pulmonary valve, elaborating the anatomicalstructure of the heart with 49 site indicators in total.An atrial appendage
anatomy and deconstruction is added based on the original 1:1 model.The leftand right atria and ventricles can be disassembled to see the specific internalanatomical structure.