Question

The white blood cells, which play a very important role in protecting the body against disease-producing organisms

• A. Are larger in size and have nearly the same number as the red blood cells
• B. Have the same size but are fewer in number than the red blood cells.
• C. Are larger in size and fewer in number than the red blood cells
• D. Have the same size and the same number as the red blood cells

Answer 1

Answer: (C)

Are larger in size and fewer in number than the red blood cells

White blood cells are bigger than red blood cells and normally are fewer in number. WBC are 12 - 17 µm in diameter whereas A typical human red blood cell has a disk diameter of approximately 6.2–8.2 µm. The normal number of WBCs in the blood is 4,500 to 11,000 WBC per microliter whereas The normal RBC range for men is 4.7 to 6.1 million cells per microliter . So, the correct option is C. ( Are larger in size and fewer in number than the red blood cells )