Final answer:
The volume of blood ejected by the left ventricle during a single contraction is known as the stroke volume, which is normally 70-80 mL for a resting adult. Remaining blood in the ventricle after ejection is called the end systolic volume.
Step-by-step explanation:
The volume of blood ejected by the left ventricle during each contraction, also known as systole, is referred to as the stroke volume. During the second phase of ventricular systole, the ventricular ejection phase, the left ventricle contracts and pumps blood into the aorta. The stroke volume of a resting adult is typically between 70-80 mL. The end diastolic volume (EDV) is about 130 mL, which means that after contraction, an end systolic volume (ESV) of 50-60 mL of blood remains in the ventricle. The measure of the fraction of blood ejected from the heart with each contraction is known as the ejection fraction, which is a percentage calculated by dividing the stroke volume (SV) by the EDV.