Heart Anatomy Internal

Heart anatomy internal medical illustration
This cross section of the heart shows the right ventricle, tricuspid valve, left ventricle, bicuspid (mitral) valve, left atrium, right atrium, superior vena cava, inferior vena cava, aorta, aortic valve, papillary muscle, chordae tendineae, and trabeculae carneae.

The heart ventricular walls consist of three layers:
the 1.epicardium, the 2.myocardium (cardiac muscle), and the 3.endocardium.

The muscular wall separating the two ventricles is the interventricular septum.