Final answer:
The strength of ventricular pumping is known as 'stroke volume,' which is the amount of blood each ventricle pumps out during each heartbeat.
Step-by-step explanation:
The strength of the ventricular pumping is termed stroke volume. Stroke volume is the amount of blood ejected by each ventricle during a single contraction. In the second phase of ventricular systole, specifically the ventricular ejection phase, the ventricles contract and pump blood out of the heart. Both the right and left ventricles pump the same amount of blood, typically ranging from 70-80 mL, known as the stroke volume. Meanwhile, the cardiac output is the volume of blood pumped by the heart in one minute, which is calculated by multiplying the stroke volume by the heart rate.