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The primary function of all lymph nodes is the production of lymphocytes, which help defend the body against microorganisms and against harmful foreign particles and debris from lymph before it is returned to the blood stream.The major clusters of lymph nodes are in six areas.Those areas are: (1) ...he primary function of all lymph nodes is the production of lymphocytes, which help defend the body against microorganisms and against harmful foreign particles and debris from lymph before it is returned to the blood stream.
the main function of lymph nodes is to act as a drainage system by absorbing and expelling proteins dead cells bacteria and other waste products from the body basically the y clean and filter the lymph before it is returned to the bloodo filter lymph they filter bacteria and other foreign materials out of lymph and expose them to lymphocytes and macrophages that can engulf them these cells multipl y in response to accumulation of such materials which is why lymph nodes swell during infections