What is the primary function of white blood cells?

Explanation

White blood cells are a key part of the immune system, defending the body against infections, bacteria, viruses, and other foreign invaders. There are several types of white blood cells, including lymphocytes and phagocytes, each with specialized roles in identifying and destroying pathogens. An unusually high white blood cell count often signals that the body is actively fighting an infection. Explore more Everyday Science MCQs on mcqstutor to keep practicing.