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A healthy heart is typically capable of pumping between 60 and 70 milliliters of blood out of the ventricles with each contraction during the systole phase. This volume is referred to as the stroke volume, which is a critical measurement in assessing the efficiency and capability of the heart's pumping mechanism. The heart's ability to pump this specific amount is influenced by various factors, including the heart's size, age, physical condition of the individual, and any existing health conditions.

In normal physiological conditions, the stroke volume provides adequate blood flow to meet the body's metabolic needs during various activities, from resting to intense physical exercise. This range is considered optimal for effective circulation and nutrient delivery to tissues throughout the body.

The other options present values that either fall outside the normal range for a healthy heart's stroke volume or do not represent typical physiological functioning. Values lower than 60 ml may indicate weak heart function or other cardiac issues, while values higher than 70 ml may be observed in athletes or under certain conditions but are generally not the standard volume for an average healthy individual.