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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 â¦ y clean and filter the lymph before it is returned to the blood.They are also a major part of the immune system, as they produce antibodies and lymphocytes. If there is an infection present in the body, the lymph nodes produce more lymphocytes to combat the infection. lymph node (pronounced /ËlÉªmf noÊd/) is a small circular ball shape organ of the immune system, distributed widely throughout the body and linked by lymphatic vessels. Ly â¦ mph nodes are garrisons of B, T, and other immune cells.