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

• A. About 1.3 gallons (approximately 5 liters)
• B. About 0.5 gallons (approximately 2 liters)
• C. About 4.0 gallons (approximately 15 liters)
• D. About 2.6 gallons (approximately 10 liters)

Answer: (A)

Verified step by step guidance

1. Understand that the average adult human body contains a certain volume of blood, which is typically measured in liters or gallons.
2. Recall that the average blood volume in an adult is approximately 5 liters, which is a commonly accepted physiological value.
3. Convert the volume from liters to gallons if needed, knowing that 1 gallon is approximately 3.785 liters.
4. Use the conversion formula: \(\text{Gallons} = \frac{\text{Liters}}{3.785}\) to find the equivalent volume in gallons.
5. Compare the calculated volume in gallons to the given options to identify the closest match, which should be about 1.3 gallons.