What is the primary function of the white blood cells?

White blood cells, or leukocytes, play a crucial role in the immune system, and their primary function is to fight infections. They serve as the body's defense mechanism against pathogens such as bacteria, viruses, fungi, and parasites. When the body detects an infection, white blood cells are activated and mobilized to the site of infection, where they seek out and destroy invading microorganisms through various means, including phagocytosis and the production of antibodies.

Additionally, different types of white blood cells have specialized functions: for example, neutrophils primarily attack bacteria, while lymphocytes are involved in recognizing specific pathogens and orchestrating more complex immune responses. Overall, the ability of white blood cells to recognize, attack, and eliminate disease-causing agents is essential for maintaining health and preventing illness.