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There is a interatrial and interventricular septum. The interatrial separates the atria and the interventricular one separates the the ventricles. There are 3 layers of the heart wall. They are the endocardium, myocardium, and pericardium.

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The chambers of the heart are the 2 atria and the lower 2 ventricles. The 2 atria are called the right atrium and left atrium. While the 2 ventricles are called the right ventricle and left ventricle.

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The 4 heart valves are the tricuspid valve, the mitral valve, the pulmonary valve, and the aortic valve.

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The different types of blood vessels are arteries, veins, and capillaries.