caption: The image shows a page from a book with a drawing of a diagram of the human heart and vascular system, along with pictures and text describing the anatomy of the heart. The diagram is composed of various parts of the body, including the heart, lungs, and other organs, all labeled with their names. The text provides further information about the heart's anatomy, such as the valves, valves, and valves, as well as the different types of valves and valves used to control the flow of blood and oxygen.