549Every Day ScienceMedium
In a normal human body, the total number of red blood cells is ________?
A30 trillion
B20 trillion
C15 trillion
D25 trillion
Correct answer
A. 30 trillion
Explanation
In a normal human body, the total number of red blood cells is 30 trillion. Women have roughly 4 to 5 million red blood cells per microliter of blood, whereas men have about 5 to 6 million per microliter of blood. Red blood cells comprise approximately 70% of total human body cell number.