Which blood cell type is primarily involved in the immune response?

Leukocytes, commonly known as white blood cells, play a pivotal role in the immune response. They are a critical component of the body's defense system, tasked with identifying and combating pathogens such as bacteria, viruses, and fungi.

There are several different types of leukocytes, each with specialized functions. For instance, lymphocytes are crucial for producing antibodies and regulating immune responses. Neutrophils act as the first line of defense against infections, while monocytes differentiate into macrophages that engulf and destroy pathogens.

Through their various functions, leukocytes actively monitor and respond to potential threats, making them essential to maintaining the body's health and protecting against disease. In contrast, erythrocytes (red blood cells) primarily serve to transport oxygen, thrombocytes (platelets) are involved in blood clotting, and plasma is the fluid component of blood that carries cells, nutrients, and waste products, but does not directly participate in immune responses.