It is about the size of a clenched fist, weighs about 10.5 ounces and is shaped the myocardium is the thickest layer of the heart wall, with its thickness varying in different parts of the heart.
Which Of The Heart Chamber Walls Is The Thickest. Because of the greater power needed in the ventricles, more cardiac muscle is needed, and so the chamber walls are thicker. Because both auricles receive blood from vena cava and pulmonary veins.
Anatomy of the heart. A, Cross section of the heart wall ... from www.researchgate.net
The heart's atria merely collect incoming blood from the body (right atrium) and from the lungs (left atrium) and push it into the ventricles. Both auricles are with comparatively thin walls. The heart chamber walls of a fetal big are about a quarter of an inch thick.
Because of the greater power needed in the ventricles, more cardiac muscle is needed, and so the chamber walls are thicker.
The heart chamber that has the thickest muscle wall is the left ventricle. This is because it has to pump the blood further around the body, and against higher pressure, compared with the right ventricle. Valves are present to prevent the backflow of blood. The inner endocardium, middle myocardium and outer.
