Final answer:
Cardiac output is the volume of blood pumped by the heart per minute. It is calculated by multiplying the heart rate by the stroke volume.
Step-by-step explanation:
Cardiac output (CO) is the volume of blood pumped by the heart per minute. It is calculated by multiplying the heart rate (HR) by the stroke volume (SV). The heart rate is the number of contractions or beats per minute, while the stroke volume is the amount of blood pumped by each ventricle in one contraction.