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Lymph nodes are small, bean-shaped glands throughout the body. They are part of the lymphatic system
, which carries fluid (lymph fluid), nutrients, and waste material between the body tissues and the bloodstream.
The lymphatic system is an important part of the immune system, the body's defense system against disease.
The lymph nodes in the groin (femoral or inguinal lymph nodes) may swell from an injury
or infection in the foot, leg, groin, or genitals.