Final answer:
Both the left and right ventricles pump the same amount of blood per contraction, but the left ventricle has thicker and better-developed muscle due to the higher pressure it needs to generate in the systemic circuit.
Step-by-step explanation:
Although both ventricles pump the same amount of blood per contraction, the muscle of the left ventricle is much thicker and better developed than that of the right ventricle. The left ventricle must generate a great amount of pressure to overcome the high resistance in the systemic circuit, while the right ventricle doesn't need to generate as much pressure due to the shorter pulmonary circuit and less resistance