Question

The average diameter of red blood corpuscles of man is

• A. 7.2$\mu$m
• B. 8.1 $\mu$m
• C. 9.2$\mu$m
• D. 10.3$\mu$m

Answer 1

The correct option is A 7.2$\mu$m

The red blood cell is the cell, which is responsible for delivering the oxygen to various body tissues. The RBCs of man (mammals) are unique as they are anucleated. They are typically shaped as biconcave disks: flattened and depressed in the center with a dumbbell-shaped cross section. They show a slight variation in size. A normal red blood cell is 6 - 8$\mu$m in diameter.
Thus, the correct answer is option (A), '7.2 $\mu$m'.