The lymph node (LN) is a pea-sized (0.1–2.5 cm long), bean-shaped organ of the lymphatic and immune system. A human possesses approximately 500–600 lymph nodes and collectively, lymph nodes enable ...

The lymphatic system is a network of vessels, nodes, and ducts that pass through almost all bodily tissues. It allows the circulation of a fluid called lymph through the body in a similar way to blood ...