Final answer:
The left ventricle generates a greater pressure than the right ventricle during the ventricular ejection phase of systole due to higher systemic resistance, but both ventricles pump the same stroke volume, which is normally 70–80 mL per contraction.
Step-by-step explanation:
The difference in pressure between point 1 and point 2 in a right ventricular pressure-volume loop compared with a left ventricular pressure-volume loop is that the left ventricle generates significantly greater pressure than the right ventricle. This is because the left ventricle has a thicker myocardium and must overcome the higher resistance in the systemic circulatory system, while the right ventricle faces less resistance due to the shorter pulmonary circuit.
Regarding the change in volume between points 2 and 3, which represents the stroke volume, right and left ventricular pressure-volume loops both pump the same amount of blood per contraction, typically in the range of 70-80 mL. The end systolic volume (ESV) will remain in the ventricles after the blood has been pumped out, which is about 50-60 mL of blood remaining following contraction.