Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Circulatory Systemmedium · 45s
In an adult, total blood volume is approximately:
TopicCirculatory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Adult blood volume averages 7–8% of body weight. For a 70-kg adult, ~5 L circulates, distributed between plasma (~55%) and cellular elements (~45%).
Final Answer: Option B - 4–5 L