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In a typical healthy adult human, approximately how much total blood volume is present in the body?
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17. The Blood
Introduction To Blood
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Approximately how much blood does an average adult human body contain?
A
About 5 liters (approximately 4.5–6.0 L)
B
About 20 liters
C
About 10 liters
D
About 1 liter
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Understand that the question is asking for the typical volume of blood in an average adult human body, which is a standard physiological fact.
Recall that blood volume varies depending on factors such as body size, sex, and health, but there is a commonly accepted average range.
Recognize that the average adult human body contains approximately 4.5 to 6.0 liters of blood, which is roughly 7-8% of total body weight.
Compare the given options to this known range to identify the closest and most accurate estimate.
Conclude that the correct answer is about 5 liters, as it falls within the typical physiological range for blood volume in adults.
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