What role do white corpuscles play in the body?

White corpuscles, also known as white blood cells, play a crucial role in the immune system, which is responsible for defending the body against infections and diseases. Their primary function is to identify and neutralize harmful pathogens such as bacteria, viruses, and other foreign invaders. Unlike red blood cells, which transport oxygen, white blood cells actively participate in various immune responses, including the production of antibodies, phagocytosis (the process of engulfing and digesting pathogens), and the coordination of the immune response through signaling molecules.

These cells are essential in protecting the body not just from external invaders but also in responding to internal threats, such as cancerous cells. When the body detects an infection, the number of white blood cells can increase significantly as they are mobilized to the site of the infection to combat the pathogens. This highlights their fundamental role in maintaining health and combating disease, making the function of defending the body vital to overall wellness.