caption: The image shows a black and white drawing of a human heart with a diagram of the internal structure of the heart. It is a detailed illustration of the anatomy of the human heart, with labels for the various parts of the body, such as the chambers, valves, and valves, as well as the heart itself. The heart is divided into two sections, with the left and right ventricles visible, and the left ventricle is located in the center of the chest. The diagram is labeled with the names of the different parts, including the pulmonary artery, pulmonary vein, and pulmonary artery.