Final answer:
The statement is true; dendritic cells and FDCs are indeed found in secondary lymphoid tissues where they serve as crucial components in presenting antigens to lymphocytes to mount an immune response.
Step-by-step explanation:
The statement that dendritic cells and FDCs (follicular dendritic cells) are found in organized secondary lymphoid tissues harboring antigen is true. Dendritic cells and macrophages are types of antigen-presenting cells (APCs) that play a crucial role in the immune response by capturing and processing antigens, and then presenting them to T and B lymphocytes in secondary lymphoid organs like lymph nodes and the spleen. Additionally, the secondary lymphoid tissues include areas called germinal centers rich in B cells and T cells, where the dendritic cells and macrophages present the antigens.
Yes, that statement is true. Dendritic cells and Follicular Dendritic Cells (FDCs) are indeed found in organized secondary lymphoid tissues harboring antigen.
Lymph nodes, for example, are secondary lymphoid organs that contain large populations of T and B cells, as well as dendritic cells and macrophages. These cells play important roles in capturing and processing antigens, and informing nearby lymphocytes about potential pathogens.