EVERYDAY SCIENCE

Detailed explanation-1: -The primary function of lymph nodes is the filtering of lymph to identify and fight infection. In order to do this, lymph nodes contain lymphocytes, a type of white blood cell, which includes B cells and T cells. These circulate through the bloodstream and enter and reside in lymph nodes. B cells produce antibodies.

Detailed explanation-2: -The lymph node can be separated into three cellular compartments: the cortex, paracortex, and medulla. The cortex contains lymphoid follicles composed mostly of B cells; in the paracortex, T cells predominate.

Detailed explanation-3: -The medullary sinus drains the lymph into the efferent lymphatic vessels. The primary function of lymph nodes is filtering interstitial fluid collected from soft tissues and eventually returning it to the vascular system.

Detailed explanation-4: -Most common type of B cell and, when not circulating through the blood, is found mainly in the lymphoid follicles of secondary lymphoid organs (SLOs). They are responsible for generating the majority of high-affinity antibodies during an infection.