Cells of the immune system
Lymphocytes
Mediators of adaptive immune responses; only cells with specific receptors for antigens
Antigen-presenting cells (APCs)
Specialized to capture, concentrate, and display antigens for recognition by lymphocytes
Dendritic cells; macrophages, B cells; follicular dendritic cells
Effector cells
Function to eliminate microbes; include lymphocytes, granulocytes (neutrophils, eosinophils), macrophages