How does the wall of the left ventricle compare to that of the right ventricle in terms of thickness and pressure?

The wall of the left ventricle is indeed thicker and generates a higher pressure when it contracts. This physiological difference is primarily due to the distinct roles that the left and right ventricles play in the circulatory system.

The left ventricle is responsible for pumping oxygenated blood to the entire body through the aorta, which requires a significant amount of force to overcome the higher resistance of systemic circulation. Consequently, the left ventricle develops a thicker muscular wall, composed primarily of cardiac muscle fibers, to generate the greater pressure necessary for this function. In contrast, the right ventricle pumps deoxygenated blood only to the lungs via the pulmonary artery, where the pressure is much lower due to the less resistive nature of the pulmonary circulation.

In summary, the left ventricle's function necessitates a thicker wall to create the high pressure needed for systemic circulation, making it capable of efficiently delivering blood throughout the body. This anatomical and functional adaptation highlights the differences between the two ventricles in terms of their structure and the pressures they generate during contraction.