Complete the following paragraph explaining how the lymphatic system is connected to the immune system.

The immune system and the lymphatic system work closely together to protect the body from (Click to select) pathogens self-cells blood natural killer cells .

The (Click to select) bone marrow lymph lymph nodes lymphatic system consists of several organs and tissues that are involved in filtering and cleaning the (Click to select) natural killer cells bone marrow self-cells blood and interstitial fluids of the body.

The lymphatic system returns (Click to select) lymphocytes lymph nodes lymph lymphatic system from the tissues of the body back to the (Click to select) pathogens circulatory system immune system excretory system . By monitoring the return of these fluids in the (Click to select) lymph lymphatic system lymph nodes lymphocytes of the body, the (Click to select) immune system self-cells pathogens excretory system detects the presence of pathogens.

The lymphatic system is also involved in the production and maturation of immune system cells called (Click to select) lymphatic system lymph lymph nodes lymphocytes .