Multiple choice general knowledge

Human body is creating and killing ______ red blood cells per second!

  1. 14 million

  2. 17 million

  3. 16 million

  4. 15 million

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

The human body continuously produces and destroys red blood cells to maintain oxygen transport. About 15 million red blood cells are created and killed every second in a healthy adult. Options A, B, and C are close but incorrect values.