Question

The smallest human cell is

• A. Erythrocyte
• B. Kidney cell
• C. Liver cell
• D. Sperm

Answer 1

The correct option is A Erythrocyte

Erythrocytes or red blood cells (RBC) are the most abundant of all the cells in the blood. A healthy adult man has, on an average, 5 million to 5.5 millions of RBCs mm–3 of blood. It is Biconcave in size.

A typical human red blood cell has a disk diameter of approximately 6.2–8.2 µm and a thickness at the thickest point of 2–2.5 µm and a minimum thickness in the centre of 0.8–1 µm, being much smaller than most other human cells. Hence The smallest human cell is Erythrocyte.

So, the correct answer is 'Erythrocyte'.