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

• A. About 1 quart
• B. About 10 quarts
• C. About 20 quarts
• D. About 5 quarts

Answer: (D)

Verified step by step guidance

1. Understand that the problem is asking for the approximate volume of blood in a typical healthy adult human body, which is a general physiological fact rather than a calculation.
2. Recall that the average adult human body contains about 7-8% of its total body weight in blood. For an average adult weighing around 70 kg (154 lbs), this translates to roughly 5 liters of blood.
3. Convert liters to quarts, knowing that 1 liter is approximately equal to 1.057 quarts. This helps relate the volume in liters to the volume in quarts, which is the unit used in the problem.
4. Calculate the approximate number of quarts by multiplying the volume in liters by the conversion factor: \(\text{quarts} = \text{liters} \times 1.057\).
5. Compare the calculated value to the given options to identify the closest approximate volume of blood in quarts for a typical healthy adult human.