EMZETT.The lymphatic system and immune defence
In short: The lymphatic system transports excess tissue fluid back into the blood and plays a central role in immune defence. Lymph nodes filter out pathogens and foreign substances along the way.
In more detail: Unlike the blood circulation, the lymphatic system has no central pump but is driven by muscle movement.
In detail
- Lymphatic vessels: A fine network of vessels collects excess fluid from body tissue.
- Lymph nodes: These small filter stations contain immune cells that intercept and fight pathogens.
- Swollen lymph nodes: Swelling often signals an active immune response to a nearby infection.
- Lymphocytes: These white blood cells partly mature within the lymphatic system and are central to the specific immune response.
- Spleen: As the largest lymphatic organ, it filters blood and plays an important role in immune surveillance.
- Lymphoedema: A disruption of lymph drainage can cause painful swelling, usually in the arms or legs.
- Movement promotes lymph flow: Regular physical activity supports the natural transport of lymph fluid.
- Note: Not a substitute for medical advice.