What is the Volume of Whole Blood in a Person's

Question

What is the volume of whole blood in a person's body who weighs 150 lb?
A) 3 L
B) 6 L
C) 9 L
D) 12 L

Accepted Answer

On average, the blood volume in a person is about 7% to 8% of their body weight. Therefore, a person who weighs 150 lb would have a blood volume of approximately 6 L (150 lb x 0.08 = 12 L; 12 L x 0.5 = 6 L since blood is approximately 50% of body weight).