What term describes blood ejection during heart contraction?

The term that describes the amount of blood ejected from the heart during each contraction is known as stroke volume. Stroke volume specifically refers to the volume of blood pumped out of the ventricle with each heartbeat, reflecting the efficiency of the heart's pumping action. This metric is crucial for understanding how well the heart is functioning as a pump and plays an important role in determining overall cardiac output when multiplied by heart rate.

Cardiac output, while related, refers to the total amount of blood the heart pumps in a minute, which combines stroke volume and heart rate. Blood pressure measures the force exerted by circulating blood on the walls of blood vessels and does not directly indicate the volume of blood ejected per contraction. Heart rate denotes the number of times the heart beats in a minute but does not describe the volume of blood pumped with each beat.