This large size heart model features 59 labeled parts making it ideal for group study. The heart separates into two parts, making it easy to trace blood flow through the chambers, valves, and vessels. This model comes with an accompanying key which highlights the coronary arteries, circumflex artery, coronary veins and coronary sinus, segments of the esophagus and trachea, lower portion of the pericardium, diaphragm section, flexible tricuspid valve, pulmonary valve, mitral valve, and aortic valve.