What role do white blood cells play in the immune system?

White blood cells, or leukocytes, are a crucial component of the immune system, playing a vital role in defending the body against infections and diseases. Their primary function is to identify, attack, and eliminate pathogens such as bacteria, viruses, and other foreign invaders that can cause illness.

Different types of white blood cells have specific roles; for example, neutrophils are the first responders to an infection, while lymphocytes, including T-cells and B-cells, have roles in adaptive immunity, including the production of antibodies and memory responses.

The immune response is critical for maintaining health, and without the action of white blood cells, the body would be unable to effectively respond to infections, making them essential in protecting against diseases and ensuring overall immune system function.