Which type of blood cells are primarily responsible for protection?

White blood cells, also known as leukocytes, are crucial components of the immune system and play a vital role in protecting the body against infections and foreign invaders. They are responsible for identifying, attacking, and destroying pathogens such as bacteria, viruses, and fungi. There are several types of white blood cells, each with specific functions. For instance, neutrophils respond quickly to infections, lymphocytes are involved in adaptive immunity, and macrophages engulf and digest microbes and debris.

In contrast, red blood cells primarily function to transport oxygen throughout the body and remove carbon dioxide, while platelets play a critical role in blood clotting and wound healing. Plasma cells, derived from B cells, produce antibodies to help identify and neutralize pathogens but are a specific type of white blood cell rather than a broad category like leukocytes. Hence, the primary responsibility for protecting against diseases falls to white blood cells, making them essential for the body's defense mechanisms.