Lymphatic System Root Words Pathogens Any foreign molecules that enter the body: Particles, viruses, bacteria, pollen, etc. Lymphatic System Part of the immune system and helps destroy pathogens that enter the body Works with circulatory system, moving white blood cells around Uses fluid from digestive and circulatory system to filter out dead cells, viruses, bacteria. After filtering, it returns the fluid Lymphatic Pathway System of capillaries and tubes that run through the body and filter bodily fluids Lymph Fluid, similar to plasma, that runs through the lymphatic pathways, filtering and transporting Lymph nodes trap and remove pathogens from the lymph as it flows through. Similar to a check point Lymph nodes store Leukocytes to destroy pathogens When you have an infection, your body produces more white blood cells, which gather in the lymph nodes This causes lymph nodes to swell. Lymphocytes Specific white blood cells that destroy pathogens in the lymphatic system Spleen Organ that recycles old red blood cells and produces lymphocytes Also stores blood and platelets. Tonsils Cluster of lymph tissue in your throat that protects against pathogens that enter your nose and mouth. Your body can function without tonsils Mechanical Barriers Skin, mucous membranes in organs, hair provide first line of defense. Chemical Barriers Enzymes, gastric juice, leukocytes, lymphocytes act as second defense after mechanical barriers fail Inflammation Tissue response to injury or infection. Infected cells release chemical that attract leukocytes to phagocytize pathogens. Result is damaged cells, destroyed bacteria called pus Inflammation Tissue response to injury or infection. Infected cells release chemical that attract leukocytes to phagocytize pathogens. Result is damaged cells, destroyed bacteria called pus