What role do white blood cells play in the body?

White blood cells, also known as leukocytes, play a critical role in the immune system by protecting the body against infections and foreign materials. They are involved in identifying, attacking, and eliminating pathogens such as bacteria, viruses, and other harmful entities. There are various types of white blood cells, each with specific functions, such as phagocytes that engulf and digest bacteria, and lymphocytes that produce antibodies to neutralize pathogens. This defensive action is essential for maintaining overall health and ensuring that the body can effectively respond to illness and infection.

Transporting oxygen is the role of red blood cells, which contain hemoglobin. Regulating hormones is mainly the function of the endocrine system, involving glands that secrete hormones into the bloodstream. Clotting blood is primarily the job of platelets, which work in conjunction with clotting factors to prevent bleeding. Therefore, the unique protective role of white blood cells solidifies their importance in the immune response and overall health.