Approximately how much blood is in the average adult human body, in U.S. pints?

• A. About 10–12 pints
• B. About 2–3 pints
• C. About 35–40 pints
• D. About 20–24 pints

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 pints.
2. Recall that the average blood volume in an adult is approximately 5 liters, though this can vary based on factors like body size and sex.
3. Convert the average blood volume from liters to U.S. pints, knowing that 1 liter is approximately equal to 2.113 U.S. pints.
4. Multiply the average blood volume in liters by the conversion factor to find the volume in pints: \(\text{Blood volume (pints)} = \text{Blood volume (liters)} \times 2.113\).
5. Compare the calculated range to the given options to identify the correct approximate blood volume in pints for an average adult.