Which law of the heart states that the heart will eject all of the blood that enters over a broad range of volumes?

The Frank-Starling Law of the heart describes the intrinsic ability of the cardiac muscle to adapt to varying volumes of blood filling the heart (preload). This law states that within physiological limits, the more the heart muscle is stretched by incoming blood during diastole, the greater the force of the contraction during systole, leading to an efficient ejection of blood. Essentially, it means that the heart can eject all the blood that is filling it, adjusting its force of contraction to match the volume of blood that it receives.

This intrinsic mechanism ensures that the heart can effectively manage varying levels of blood return, maintaining adequate cardiac output and circulation despite changes in body position, activity level, or blood volume status. This adaptability is crucial for the heart's function, especially when faced with fluctuating demands during physical activity or different physiological states.

Other laws mentioned do not pertain to the heart’s function in the same manner. Bernoulli's Law relates to fluid dynamics and pressure differences, Newton's Law pertains to motion and forces unrelated to the heart, while Ohm's Law deals with electrical circuits, not cardiovascular physiology. Therefore, only the Frank-Starling Law accurately encapsulates the heart's ability to eject all the blood it receives over a range of