How do white blood cells help to defend about pathogens?

White blood cells, or leukocytes, play a crucial role in the immune system by identifying and attacking pathogens such as bacteria, viruses, and parasites. They recognize these harmful invaders through specific markers, leading to various responses, including phagocytosis (engulfing and digesting pathogens) and the production of antibodies to neutralize them. Some white blood cells, like T cells, also help coordinate the immune response, while others, like B cells, produce antibodies to target specific pathogens. Together, they work to protect the body from infections and promote healing.