Multiple Choice
In a typical healthy adult human, approximately how many gallons of blood are present in the body?
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17. The Blood
Introduction To Blood
Multiple Choice
Approximately how many gallons of blood are in the average adult human body?
A
About 0.25 gallon
B
About 3–4 gallons
C
About 1–1.5 gallons
D
About 6–7 gallons
Verified step by step guidance1
Understand that the average adult human body contains a certain volume of blood, which is typically measured in liters or gallons.
Recall that the average blood volume in adults is roughly 7-8% of their total body weight. For an average adult weighing about 70 kg (154 lbs), this translates to approximately 5-6 liters of blood.
Convert the volume from liters to gallons, knowing that 1 gallon is approximately 3.785 liters. Use the formula: \(\text{Gallons} = \frac{\text{Liters}}{3.785}\).
Calculate the approximate range of blood volume in gallons by dividing the estimated liters of blood (5-6 liters) by 3.785 liters per gallon.
Compare the calculated range to the given options to identify which one best matches the typical blood volume in an average adult human.
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