What are two main functions of lymph nodes?

The primary functions of lymph nodes focus on their roles in the immune system, specifically in filtration and lymphocyte production. Lymph nodes act as filters for foreign particles and pathogens that are present in the lymphatic fluid. This filtration process helps to cleanse the lymph, trapping bacteria, viruses, and other harmful substances, thereby preventing them from entering the bloodstream.

Moreover, lymph nodes are critical sites for the production and maturation of lymphocytes, which are essential components of the immune response. They allow for the proliferation of B cells and T cells, both of which are vital for recognizing and responding to infections. The combination of filtration and the production of these immune cells equips the body to respond effectively to various pathogens.

The other choices either relate to functions that are not primarily associated with lymph nodes or emphasize roles outside their main immune function. Filtration and detoxification is a broader concept that may apply to various organs but does not specifically highlight the immune functions as clearly. Absorption and storage generally pertain to digestive functions rather than lymphatic functions. Lastly, while protection is a general role of the immune system, clotting specifically relates to hemostasis and is not a function of lymph nodes. Thus, the combination of filtration and lymphocyte production accurately describes the essential