Описание книги
A chart of the human heart would show the details of the valves and arteries. It shows the aspects of the circulatory system in relation to the heart. Details are given about it being a muscle as well as how many times it should beat for children and adults at various ages in life. Chambers are labeled, the mitral and tricuspid valve are labeled and the blood vessels are shown in color to help designate those that take blood from the heart and those that take blood to the heart.