Final answer:
The statement is true. The assertion that the left ventricle must generate greater pressure than the right ventricle due to higher aortic pressure is true. The left ventricle's muscle is thicker to overcome the systemic circuit's resistance, and although both ventricles pump the same stroke volume, the left ventricle's workload in pressure generation is higher.
Step-by-step explanation:
The statement that pressure in the aorta is greater than pressure in the pulmonary trunk is true, hence the left ventricle must generate a greater pressure than the right ventricle to eject blood from the heart. During the ventricular ejection phase of the cardiac cycle, the contraction of the ventricular muscle increases the pressure within the ventricles higher than that of the aorta and pulmonary trunk, allowing the blood to be pumped out.
Both ventricles pump the same stroke volume, approximately 70-80 mL of blood, but due to the systemic circuit requiring higher pressure to overcome greater resistance, the muscle of the left ventricle is significantly thicker than that of the right ventricle. This muscle thickness is necessary for the left ventricle to generate the required pressure to push the blood into the systemic circulation through the aorta, while the right ventricle, with less resistance in the pulmonary circuit, does not need to produce as much pressure.