In a typical healthy adult human, approximately how many gallons of blood are present in the body?

• A. About 0.5 gallons
• B. About 6 gallons
• C. About 1.5 gallons
• D. About 3 gallons

Answer: (C)

Verified step by step guidance

1. Understand that the average blood volume in a typical healthy adult human is generally estimated based on body weight and physiological norms.
2. Recall that the average adult has about 4.5 to 5.5 liters of blood, which can be converted into gallons for easier comparison with the options given.
3. Use the conversion factor: 1 gallon is approximately 3.785 liters, to convert the average blood volume from liters to gallons.
4. Calculate the approximate number of gallons by dividing the average blood volume in liters by 3.785 liters per gallon, i.e., \(\text{Gallons} = \frac{\text{Liters of blood}}{3.785}\).
5. Compare the calculated value with the provided options to identify the closest estimate of blood volume in gallons for a typical healthy adult.