COVID-19: Learn more about testing and what to expect when you visit any LMH Health location.
COVID Vaccination: Frequently Asked Questions as well as what you need to know today. Learn more
View All Services
Find a New Primary Care Provider
Search by Specialty
View All Locations
Discover classes, events, tours, and groups that fit your interests.
Home > Be Healthy > Health Library > Lymph system
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.
Current as of: September 23, 2020
Author: Healthwise Staff
Medical Review:Anne C. Poinier MD - Internal Medicine & Adam Husney MD - Family Medicine & Elizabeth T. Russo MD - Internal Medicine
To learn more about Healthwise, visit Healthwise.org.
© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.