Organs
This organ filters blood and helps fight infections.
This type of immunity occurs after receiving a vaccine.
What is active immunity?
This clear fluid carried by the lymphatic system contains white blood cells that fight germs.
What is lymph?
What is infection?
These structures prevent lymph from flowing backward.
What are valves?
This gland is where T cells mature.
What is the thymus?
These cells produce antibodies.
What are B cells?
The lymphatic system helps maintain this balance in body tissues.
What is fluid balance?
This cancer affects the lymphatic system itself.
What is lymphoma?
This movement helps push lymph through vessels during exercise.
What are muscle contractions?
These structures in the throat help trap bacteria and viruses.
What are tonsils?
These immune cells attack infected body cells directly.
What are T cells?
This body system works closely with the lymphatic system to protect the body.
What is the immune system?
This condition happens when the tonsils become swollen and infected.
What is tonsillitis?
These tiny vessels collect excess tissue fluid.
This tissue inside bones produces white blood cells.
What is bone marrow?
These white blood cells help the body fight infections.
What are lymphocytes?
The lymphatic system transports this fatty substance from the digestive system.
What are fats (or lipids)?
This condition causes swelling due to blocked lymph vessels.
This large duct drains lymph from most of the body.
What is the thoracic duct?
What are lymph nodes?
These cells "eat" harmful bacteria and dead cells.
What are macrophages?
Lymph nodes filter lymph fluid and trap these harmful substances before they spread.
What are bacteria, viruses, toxins, damaged cells, or cancer cells?
This process occurs when cancer cells travel through the lymphatic system to parts of the body.
What is metastasis?
Lymph eventually empties back into these blood vessels near the heart.
What are veins?