What primary cell types make up lymph nodes?

Lymph nodes are essential components of the immune system, primarily composed of lymphocytes and reticulum cells. Lymphocytes are a type of white blood cell that plays a critical role in the immune response, helping the body to recognize and fight infections and foreign substances. There are different types of lymphocytes, such as B cells, which develop into plasma cells to produce antibodies, and T cells, which have various roles in immune regulation and response.

Reticulum cells, also known as follicular dendritic cells, are part of the supporting structure within lymph nodes. These cells provide a matrix that assists in the organization of lymphatic tissue and helps in the activation and proliferation of lymphocytes. They play a vital role in maintaining the microenvironment of the lymph node, facilitating immune responses, and presenting antigens to lymphocytes.

In summary, the presence of lymphocytes for immune function and reticulum cells for structural support characterizes the primary cell types in lymph nodes, making the identification of these cell types crucial to understanding lymphatic system function and immune responses.