Schedule your COVID-19 vaccination now! We are unable to accommodate walk-ins. Please do not call St. Luke's clinics directly about COVID vaccine scheduling. Unless you need to call for an emergency, please use myChart for questions and appointments. To ensure we're able to provide safe care in a safe environment for all patients, masks are required in all St. Luke's facilities, regardless of COVID-19 vaccination status. Learn more.
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The lymph system is a network of vessels and organs throughout the body. This network carries a fluid that contains special white blood cells called lymphocytes between the body tissues and the blood.
The lymph system includes the lymph nodes, tonsils, thymus, spleen, and bone marrow. The lymph nodes filter lymph fluid as it flows through them, trapping bacteria, viruses, and other foreign substances, which are then destroyed by the lymphocytes.
The lymph system is also an important part of the immune system, the body's defense against disease. When a part of the body is infected, the nearby lymph nodes become swollen as they collect and destroy the infecting organisms. For example, if a person has a throat infection, lymph nodes in the neck may swell and become tender.
Sometimes diseases, like cancer, can begin and spread through the lymph system.
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