alleryStart learning →Blood makes up approximately what percentage of adult body weight?
AAbout 4 percent
BAbout 8 percent
CAbout 15 percent
DAbout 25 percent
Answer & Solution
Correct answer: B. About 8 percent
1. Blood constitutes approximately 8 percent of adult body weight.
2. This matches the usual volumes quoted, about 5 to 6 litres in adult males and 4 to 5 litres in adult females.
3. A figure of 4 percent would imply roughly half the normal blood volume, which is not survivable as a baseline.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 18 "The Cardiovascular System: Blood", section 18.1 An Overview of Blood_
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