What are lymph nodes?

Lymph nodes are indeed gland-like structures that play a crucial role in the lymphatic system. They are distributed throughout the body and serve as critical points where lymph—a clear fluid that transports immune cells, waste products, and other substances—can be filtered. The lymph nodes contain lymphocytes, which are a type of white blood cell, and they help to identify and respond to infections and other foreign substances.

When lymph fluid passes through these nodes, the immune cells can detect and respond to pathogens, such as bacteria and viruses, helping to mount an immune response. This filtration process is essential for maintaining the body's defense system. The correct understanding of lymph nodes includes recognizing their function in both the lymphatic system and the broader context of the immune response.