The main function of white blood cells is

• (a) To help red blood cells in the transportation of oxygen and carbon dioxide.
• (b) To clot the blood at the time of injuries
• (c) To accelerate the production of red blood cells in the bone marrow
• (d) To defend the body against infections

The primary role of white blood cells is to defend the body against infections. They are a crucial part of the immune system, helping to identify and eliminate pathogens like bacteria and viruses.

Functions of White Blood Cells

White blood cells, also known as leukocytes, perform several important functions:

• Immune Response: They recognize and attack foreign invaders.
• Infection Control: They help to destroy harmful microorganisms.
• Inflammation Regulation: They participate in the inflammatory response to injury or infection.

Other Blood Components

While white blood cells focus on defense, other components of blood have different roles:

• Red Blood Cells: Responsible for transporting oxygen and carbon dioxide.
• Platelets: Essential for blood clotting during injuries.

In summary, the correct answer to the question is (d) To defend the body against infections.