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How do the right and left ventricles differ in the pressure they produce?

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Silhouette diagram of the human body highlighting the heart and major blood vessels, with labeled arteries in red and veins in blue to show the structure of the cardiovascular system. — Circulatory system Human circulatory system.

In birds and mammals, the right and left ventricles function differently to accommodate the distinct pressure requirements of the pulmonary circulation and the systemic circulation, respectively.1

The right ventricle acts primarily as a volume pump, while the left ventricle functions as a pressure pump. Because the systemic circuit is much longer than the pulmonary circuit, the left ventricle requires significantly more force to propel blood throughout the body. To achieve this, the left ventricle possesses a thick, muscular wall that allows it to develop much higher pressure during contraction compared to the right ventricle.12

In humans, this difference is substantial; the pressure generated in the aorta by the left ventricle is approximately six times higher than the pressure in the pulmonary artery produced by the right ventricle. Despite these differing pressures, both ventricles must transport the same volume of fluid per unit of time to maintain the balance of the circulatory system.1