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

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

Answer: (D)

Verified step by step guidance

1. Understand that the average volume of blood in a typical healthy adult is generally measured in liters or gallons and depends on factors such as body size and sex.
2. Recall that the average adult has approximately 4.5 to 5.5 liters of blood, which is roughly equivalent to 1.2 to 1.5 gallons (since 1 gallon ≈ 3.785 liters).
3. Convert liters to gallons using the conversion formula: \(\text{Gallons} = \frac{\text{Liters}}{3.785}\) to estimate the blood volume in gallons.
4. Compare the converted value to the given options to identify the closest approximate volume of blood in gallons for a typical healthy adult.
5. Conclude that the correct answer is about 1.5 gallons, as it aligns with the average blood volume range for adults.