The role of immune cells

Immune cells are cells that possess immune functions and can effectively respond to external pathogens, providing immunoprotective effects. The main functions of immune cells include: 1. Clearing pathogens and foreign substances from the external environment: Immine cells can promote the aggregation of pathogens, thereby inhibiting their growth. 2. Promoting cytotoxic reactions: In a process known as "cytotoxicity," immune cells recognize "foreign substances," force harmful agents to cluster together, and then destroy them. 3. Mediating antigen-antibody responses: Immune cells can remember previously encountered antigens, enabling effective immune responses upon future exposure. 4. Facilitating cellular immune responses: Immune cells initiate immune reactions that help defend against viral, bacterial, and parasitic infections. In summary, immune cells effectively prevent invasion by viruses, bacteria, and other harmful agents, maintain normal function of the human immune system, and enhance the body's immune protection.