Multiple choice

What percentage of body weight does blood make up in human?

  1. 20%

  2. 15%

  3. 40%

  4. 5%

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Blood makes up approximately 7% to 8% of an adult's total body weight. Among the provided choices, 5% is the closest approximation to this physiological fact.