In an average healthy adult, approximately how many gallons of blood are contained in the body?

• A. About 1.5 gallons
• B. About 0.5 gallons
• C. About 6.0 gallons
• D. About 3.0 gallons

Answer: (A)

Verified step by step guidance

1. Understand that the average volume of blood in a healthy adult is typically measured in liters or gallons and depends on factors such as body size and sex.
2. Recall that the average adult has about 4.5 to 6 liters of blood circulating in their body.
3. Convert liters to gallons using the conversion factor: 1 gallon is approximately 3.785 liters.
4. Calculate the approximate number of gallons by dividing the average blood volume in liters by 3.785 liters per gallon using the formula: \(\text{Gallons} = \frac{\text{Liters of blood}}{3.785}\).
5. Compare the calculated value to the given options to identify the closest approximate volume of blood in gallons.