What role do leukocytes play in the body?

Leukocytes, also known as white blood cells, play a critical role in the immune system by defending the body against disease, infections, and foreign invaders. These cells are vital for the body's ability to recognize and respond to pathogens such as bacteria, viruses, and parasites. They do this through various mechanisms, including the production of antibodies, phagocytosis (the process of engulfing and destroying pathogens), and orchestrating the immune response by signaling other cells to act.

Recognizing the importance of leukocytes highlights their function as the body's primary defense mechanism. This protection is essential for maintaining health and preventing illnesses that can arise from infections or foreign substances.