SSC CGL
MediumQ. No. what-is-the-total-volume-of-blood-in-an-adult-human-body
What is the total volume of blood in an adult human body?
Last Updated:
A2-3 litres
B4-5 litres
C5-6 litres
D8-9 litres
Correct Answer: 5-6 litresYour Answer: C
Last Updated:
✅ Correct Answer: C — 5-6 litres
An average adult human body contains approximately 5 to 6 litres of blood. This accounts for about 7-8% of total body weight. Blood consists of plasma (55%), red blood cells (45%), and small amounts of WBCs and platelets. Blood volume can vary based on body size, age, and gender.
❌ Why other options are wrong:
• A. 2-3 litres — This is too low; 2-3 litres would indicate severe blood loss (hemorrhage).
• B. 4-5 litres — Close but not the standard value; the average is 5-6 litres for adults.
• D. 8-9 litres — This is too high; no healthy adult has 8-9 litres of blood normally.
📝 Important Note: Normal adult blood volume = 5-6 litres (men: ~5.5L, women: ~4.5L). Blood makes up ~8% of body weight. A donation of ~450 ml is safe as the body replenishes it quickly. This is a standard SSC CGL factual question about human biology.
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