How many quarts of blood are pumped through the heart in a 24 hour period with a heart rate of 72 bpm?

To calculate the total quarts of blood pumped through the heart in a 24-hour period with a heart rate of 72 beats per minute (bpm), we first determine the volume pumped per beat. The average stroke volume is about 0.75 quarts (or 700 mL) per beat. Multiplying the heart rate by the number of minutes in a day gives us 103,680 beats (72 bpm × 1,440 minutes). Therefore, the total blood pumped in 24 hours would be approximately 77,760 quarts (103,680 beats × 0.75 quarts/beat).