Lymph tissue in the head and neck. picture
Lymph nodes play an important part in the body's defense against infection. Swelling might occur even if the infection is trivial or not apparent.



Review Date: 10/3/2005
Reviewed By: A.D.A.M. Medical Illustration Team: Meredith Nienkamp, M.S.M.I., Dan Johnson, M.S.M.I., Lisa Higginbotham, M.S.M.I. Review also provided by VeriMed Healthcare Network.