What type of cells are primarily involved in the immune response to pathogens?

The immune response to pathogens is primarily mediated by leukocytes, also known as white blood cells. These specialized cells play a crucial role in identifying, attacking, and eliminating foreign invaders such as bacteria, viruses, and other harmful microorganisms. Leukocytes include various types of cells, such as lymphocytes (B cells and T cells), neutrophils, monocytes, eosinophils, and basophils, each with specific functions that contribute to the overall immune response.

For instance, B cells are responsible for producing antibodies that neutralize pathogens, while T cells can directly kill infected cells or help regulate the immune response. This coordinated action among different types of leukocytes enhances the body’s ability to defend itself against infections and maintain health. Other cell types listed, like platelets, erythrocytes, and fibroblasts, have different primary functions and are not directly involved in the immune response to pathogens.