객관식
In an average healthy adult, approximately how many gallons of blood are contained in the body?
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17. The Blood
Introduction To Blood
객관식
In an average healthy adult, approximately how much total blood volume is contained in the body?
A
About 20 liters (approximately 18–22 L)
B
About 10 liters (approximately 9–11 L)
C
About 1 liter (approximately 0.5–1.5 L)
D
About 5 liters (approximately 4.5–6.0 L)
검증된 단계별 안내1
Understand that the total blood volume in an average healthy adult is a physiological parameter that varies based on factors such as body size, sex, and overall health.
Recall that typical blood volume is often estimated as a proportion of body weight, commonly around 7-8% of total body weight in kilograms.
Use the formula for estimating blood volume: \(\text{Blood Volume} = \text{Body Weight} \times \text{Average Blood Volume per kg}\), where average blood volume per kg is approximately 70-80 mL/kg.
Recognize that for an average adult weighing about 70 kg, multiplying by 70-80 mL/kg results in a total blood volume close to 5 liters.
Conclude that the approximate total blood volume in an average healthy adult is about 5 liters, which aligns with the typical physiological range of 4.5 to 6.0 liters.
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