Features: 1. The model is about 1: 1 enlarged in the adult heart, showing a dilated state. According to the body's normal physiological position on the stent. 2. Transverse along the pulmonary artery root, showing the internal structure of the left and right atria and pulmonary artery, advocate pulse semilunar valve. Diagonal cut along the atrium, showing the internal structure of the left ventricle. 3. Right atrium showed on the inferior vena cava, inferior vena cava valve, coronary sinus ostium, ovarian fossa and right atrioventricular orifice; right atrial shows left and right pulmonary vein ostium and left atrioventricular orifice.(2 parts) Human heart anatomy model The natural large human heart, 2 parts, shows the normal morphological structure of the heart, veins and valvular structures. 4. It is a great tool for teaching and learning of human heart structure. 5. The model is easy to disassemble and install. It vividly shows the internal structure. 6. Heart Model only, other accessories demo in the picture is not included. Specifications: Material: PVC Color: As the pictures show Type: Heart Model Dimension: Approx. 22 x 15.5 x 9cm/ 8.66 x 6.10 x 3.54in (Full Height x Heart Height x Maximum Width) Quantity: 1 Set Note: 1. No retail package. 2. Please allow 0-1cm error due to manual measurement.Pls make sure you do not mind before you bid. 3. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes 1 x Heart Model 1 x Base