Final answer:
The force by which blood is ejected from the left ventricle during systole is called systolic pressure.
Step-by-step explanation:
The force by which blood is ejected from the left ventricle during systole is referred to as systolic pressure. During the phase of the cardiac cycle known as ventricular systole, particularly in the ventricular ejection phase, the contraction of the ventricular muscle increases the pressure within the ventricle. This pressure becomes greater than that in the pulmonary trunk and the aorta, leading to the ejection of blood from the heart. The left ventricle experiences a significantly higher pressure due to the higher pressure already present in the aorta compared to the pressure in the pulmonary artery. However, despite the difference in pressures, both ventricles eject an equivalent volume of blood, which is termed the stroke volume.