Define limphy node??

A lymph node is a small, bean-shaped organ of the lymphatic system that plays a crucial role in the body's immune response. They are found throughout the body and are connected by a network of lymphatic vessels. Lymph nodes filter lymph fluid, which contains waste products, pathogens, and immune cells, to remove harmful substances and activate immune responses against infections. They contain specialized immune cells, such as lymphocytes and macrophages, which help in the detection and elimination of foreign substances. Lymph nodes can become swollen or enlarged when there is an infection or inflammation in the body, indicating an active immune response.